新苏教版二年级数学下册第3、4单元教案

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management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plement the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformatio n and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

第3单元认识方向

单元备课

教学目标：

1.经历在现实的情境中确定和区分东、南、西、北四个方向的过程，能正确地辨别这四个方向。

2.在用东、南、西、北四个方向词语描述所在的方位及根据给定的一个方向确定其他三个方位的过程中，提高运用所学的方位知识解决简单实际问题的能力，培养数学应用意识，发展对数学的兴趣。

3.经历将现实的空间位置抽象为平面图的过程，了解平面图上“上北、下南、左西、右东”的规定，能看懂简单的平面图，并能描述物体的相对位置和行走路线。

4.在描述物体位置关系和行走路线的过程中，体会物体位置关系的相对性，积累数学活动经验，提高运用所学知识解决简单实际问题的能力，发展空间观念。

5.能在现实情境和平面图上辨认东南、东北、西南、西北能正确使用学过的方

位词描述物体之间的位置关系。

6．在确定方向的过程中，能进行认真的观察和积极的思考。

7．能清楚地说明自己观察的结果和思考的过程，解决生活中的问题。

8．能主动与他人开展有效的合作与交流，体会到数学与现实生活的密切联系。

9、在具体的操作活动中，进一步加强方向感，提高认识路线图的能力。

10、在实际活动中加强小组合作能力，提高实际操作能力，同时体会成功的喜悦，感悟集体的力量。

11、在观察、解决实际问题的过程中，感悟数学与生活的密切联系，培养学生运用生活经验帮助思考的意识。

教学重难点：

1.能正确地辨别东、南、西、北四个方向

2.了解平面图上“上北、下南、左西、右东”的规定，能看懂简单的平面图，并能描述物体的相对位置和行走路线。

3.用东、南、西、北四个方向词语描述所在的方位及根据给定的一个方向确定其他三个方位

4.在描述物体位置关系和行走路线的过程中，体会物体位置关系的相对性。

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd ex empl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

5.能正确使用学过的方位词描述物体之间的位置关系。

6.认识方向，并读懂路线图。

课时安排：

4课时

第 1课时

教学目标：

1.经历在现实的情境中确定和区分东、南、西、北四个方向的过程，能正确地辨别这四个方向。

教学重点：

能正确地辨别东、南、西、北四个方向

教学难点：

用东、南、西、北四个方向词语描述所在的方位及根据给定的一个方向确定其他三个方位

教学准备：

挂图

教学过程：

一、情境导入

二、交流共享

认识东、南、西、北。

1.教学例题。

出示挂图

提问：从图中，你看到了什么？想到了什么？

你知道太阳是从哪个方向升起的吗？哪个方向是东？

谈话：同学们说得很好。请同学们起立，面向太阳站好。你能说说自己的面前是什么方向吗？你的后面、右面、左面各是什么方向？自己先指一指、说一说，再跟小组内的同学说一说。

学生活动，并在小组内交流。

administeri ng the part y, first of all, to exalt the party Constit ution, and pi pe the w hol e party, t he ruli ng party of the party Constituti on. Revered Constituti on reflecte d in awe. Party a party of ideal s and beli efs pur pose, summe d up t he party's fine tradition and style; a cl ear party members a nd w ha t can be done and what must be done, what cannot be done. Ea ch Communi st Party Constituti on to a we and wary eye enhancing t he sa cred se nse of responsibility a nd mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according o the Constit ution of dire ction t owards standards efforts. Respect reflecte d in the study the party Constitution means. Some party members joi ned t he party Constit ution on t he shelf, not to lear n, some l ong-term party according to the Constituti on of the party's orga nization, the part y is not required to pay membership dues, l oose concept, party organizati ons of the party organizati on, a nd tur ned a blind eye on the tasks assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, t hi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons1

carried out "practi ce line pioneer sta ndar d, and post spurs" "members concentrated service m onths", activities, e ducation guide members always ev erywhere beari ng in mind ide ntity, ba sed job post, a ctive play rol e. To devel op differentiated learni ng educati on gui de party members in a ccorda nce wit h their own sit uation, target the problems to, base d on the work done. Pay attention to t he room and r oom for grass-r oots party organizations, grass-root s party organizations have m ore autonomy in e ducation, making educati on more gr ound, full of vitality, good effect. Finall y, hig hlight the normal long-term. To hig hlight the characteristi cs of recurrent educati on, with long flowi ng, continuous li ne of perseverance the perseverance to promote e ducational efforts to realize the party's ideol ogical a nd political construction of routi ne institutionalizati on. Wit h the party branch as t he base unit. Play the role of party branche s shoul d be, i s the key to educati onal succe ss. Ea ch bra nch must take strict e ducation a nd management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substan ce, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plement the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" m embers 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educat onal i nteraction. In short, through soli d and effective w ork

initiatives

全班交流。

谈话：现在请同学们转过身来坐下，我们看图：小明也像同学们一样，在一天早晨，面向太阳站立。你知道小明的前面、后面、右面、左面各是什么方向吗？（根据学生回答，把课本上的四句话填完整）

小结：通过刚才的活动，我们认识了东、南、西、北四个方向。（揭示课题：认识东、南、西、北）

2.教学“试一试”。

下面我们来做个游戏好吗？

（1）游戏示范：请一个学生上来，先跟老师合作。由老师说口令，学生按口令做。

（2）学生活动：同桌学生先由一个人说口令，另一个人做，再进行交换。

（3）谈话：同学们做游戏的时候，学生面向北面战立，一边指方向，一边回答。

三、反馈检测

1.“想想做做”第1题。

指名学生口答，小红面向西，她的前面、左面、右面各是什么方向？

提问：你是怎样很快确定其他三个面的，说给同学听听。

2.“想想做做”第2题。

指名两名同学到讲台前，面对面站立，指出自己的前、后、左、右，再指出各自的东、西、南、北。其他同学注意听，思考有什么新发现。

3、“想想做做”第3题。

出示题目插图，指名读题。

找出图中窗户的位置，这个位置在房间的哪一面？你能说说房间的东面和西面各有什么吗？

指名回答。

追问：你是怎样想的？你住的房间是怎样布置的？（小组交流，指定几人说给全班同学听。）

4、“想想做做”第4题。

谈话：课前老师要同学们到学校的操场上去，看看操场的东、南、西、北各有什么？都去观察了吗？

指名说操场的东、南、西、北各有什么？

四、全课总结。

roken probl em, fill the short Board, so that t he majority of party member s and fully qualified, compre hensive skill s of grass-r oots party organizati ons, grass-root s party level upgrade. Comrade s, do a "two" learning e ducation is of great signifi cance, responsi bilities, carry signifi cant impli cations. City levels party and general member s cadre s, to deep awar eness "two learn a do" lear ning educati on of importance and ne ed, to height of politica l consciously and full of political e nthusiasm, put "two lear n a do" learning e ducation carrie d out g ood, for coordi nation advance "four a full" strategy layout, and a chieve d "Thirtee n-Five" good start, a nd spee d up construction more hig h ecologi cal vitality ha ppi ness of City provi des strong powerful guarantee. Two, starting from the revered Constituti on respe cted the party Constituti on wa s XI Jinping, General Secretary to the party's request, 18 six ple nary session of the Central Commission for discipline i nspecti on report "five experience" first. Full strictly administeri ng the part y, first of all, to exalt the party Constit ution, and pi pe the w hol e party, t he ruli ng party of the party Constituti on. Revered Constituti on reflecte d in awe. Party a party of ideal s and beli efs pur pose, summe d up t he party's fine tradition and style; a cl ear party members a nd w ha t can be done and what must be done, what cannot be done. Ea ch Communi st Party Constituti on to a we and wary eye enhancing t he sa cred se nse of responsibility a nd mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according t o the Constit ution of dire ction t owards standards effort s. Respect reflecte d in the study the party Constitution means. Some party members joi ned t he party Constit ution on t he shelf, not to lear n, some l ong-term party according to the Constituti on of the party's orga nization, the part y is not required to pay membership dues, l oose concept, party organizati ons of the party organizati on, a nd tur ned a blind eye on the tasks

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons2

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

今天这节课，我们学习了什么？你有什么收获？

教学反思：

第2课时

教学目标：

1.经历将现实的空间位置抽象为平面图的过程，了解平面图上“上北、下南、左西、右东”的规定，能看懂简单的平面图，并能描述物体的相对位置和行走路线。

2.在描述物体位置关系和行走路线的过程中，体会物体位置关系的相对性，积累数学活动经验，提高运用所学知识解决简单实际问题的能力，发展空间观念。

教学重点：了解平面图上“上北、下南、左西、右东”的规定，能看懂简单的平面图，并能描述物体的相对位置和行走路线。

教学难点：在描述物体位置关系和行走路线的过程中，体会物体位置关系的相对性。

教学准备：

教学过程：

一、情境导入。

谈话：谁来说一说，学校操场的东、南、西、北各有什么？

请同学们设想一下，假如用摄象机从操场的上方往下拍，拍到的画面应该是什么样子的？

学生交流。

谈话：同学们说得很好，只是要想拍到这样的画面，得站得很高才行。不过不要紧，我们可以用平面图，把操场四周的景物记录下来。今天这节课，我们就来认识平面图。

二、探究交流。

1、认识平面图。

谈话：同学们手中都有一张这样的平面图，（拿出操场平面图示意一下）图的中间是学校的操场，你能把操场的东、南、西、北面各有什么记录在这张平面图上吗？

学生活动：在平面图的四个方位上分别填上体育馆、教学楼、篮球场、看台。roken probl em, fill the short Board, so that t he majority of party member s and fully qualified, compre hensive skill s of grass-r oots party organizati ons, grass-root s party level upgrade. Comrade s, do a "two" learning e ducation is of great signifi cance, responsi bilities, carry signifi cant impli cations. City levels party and general member s cadre s, to deep awar eness "two learn a do" lear ning educati on of importance and ne ed, to height of politica l consciously and full of political e nthusiasm, put "two lear n a do" learning e ducation carrie d out g ood, for coordi nation advance "four a full" strategy layout, and a chieve d "Thirtee n-Five" good start, a nd spee d up construction more hig h ecologi cal vitality ha ppi ness of City provi des strong powerful guarantee. Two, starting from the revered Constituti on respe cted the party Constituti on wa s XI Jinping, General Secretary to the party's request, 18 six ple nary session of the Central Commission for discipline i nspecti on report "five experience" first. Full strictly

initiatives

教师巡视了解学生的制图策略，选择几种有代表性的，贴到黑板上展示。

反馈：刚才有几个同学已经将自己制作的平面图贴到黑板上了，先请这几个同学上来介绍一下自己的作品。还有同学想把自己的作品展示给大家吗？

讨论：请同学们仔细观察这些平面图，你能发现有什么问题吗？怎样解决这一问题吗？请在小组内讨论。（定的北面不同，你认为可以怎样解决这一问题？）学生讨论后，组织讨论，形成共识：在平面图上应该有一个统一的确定方向的标准。

讲解：在地图或平面图上，通常是按上北、下南、左西、右东的规定来确定的。为了标明方向，在地图和平面图上通常用这样的符号（板书：北）来表示方向。这个符号叫指向标，这个指向标的意思是箭头所指的方向是北面。

谈话：现在请同学们回过头来看一看自己刚才制作的平面图，有不符合要求的地方吗？把你制作的平面图上不符合要求的地方纠正过来。完成后，再把你的作品展示到黑板上。

学生活动：纠正自己制作的平面图，使其符合规范，并把作品确定平面图上的其他三个方向。

全班交流：结合自己的作品说一说指向标是什么意思，怎样确定平面图上的其他三个方向。

小结：同学们学得都很主动，不但认识了平面图，还能清楚地表达平面图上物体的位置关系。

三、反馈完善。

1、“想想做做”第1题。

先让学生说说图的意思，再提问：小红到人民公园应向哪个方向走？如果小红想到百货大楼去，应该向哪个方向走？去新华书店呢？

2、“想想做做”第2题。

出示图。

问：如果你要向大家介绍一下这所学校，你准备怎样介绍？先在小组内说一说。

小组交流后，指名在全班交流。

再出示题中填空部分，指名回答，并在课本上填空。

3、“想想做做”第3题。

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons4

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

出示题目。

提问：从水上世界出发到望梅阁应该怎样走？（学生讨论，交流）

你还能提出其他问题吗？

4、“想想做做”第4题。

出示公交线路图。

学生自己看图填空，集体订正。

5、“想想做做”第5题。

学生读题，提问：有什么不理解的问题吗？（引导学生理解题意时，着重解决下面的两个问题：（1）大楼的紧急疏散图有什么作用？（2）紧急疏散时，为什么不能走电梯？）

提问：从图中知道了什么？（引导学生用方位概念表达图中房间、会议室、电梯、安全出口的相对位置关系。）

讨论：假如遇到了紧急情况，你认为每个房间的人该走怎样的路线？先在小组里讨论。

学生在小组内交流，教师参与学生的讨论。

四全课总结。

通过今天这节课的学习，你知道了什么？有什么收获？你对自己今天在课上的表现满意吗？

教学反思：

第3课时

教学目标：

1. 能在现实情境和平面图上辨认东南、东北、西南、西北能正确使用学过的

方位词描述物体之间的位置关系。

2．在确定方向的过程中，能进行认真的观察和积极的思考。

3．能清楚地说明自己观察的结果和思考的过程，解决生活中的问题。

4．能主动与他人开展有效的合作与交流，体会到数学与现实生活的密切联系。教学重难点：

能正确使用学过的方位词描述物体之间的位置关系。

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substan ce, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plement the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" m embers 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educat onal i nteraction. In short, through soli d and effective w ork

initiatives

教学用具：情景图

教学过程：

上课前：同学们，你们学过哪些成语？谁来说一说？生踊跃发言。

一、先学探究：

老师知道一个成语：四面八方。

你知道四面是哪四面吗？（东、南、西、北）

出示例题的部分图（人民桥、超市、公园、体育场先不出现）

谁来说一说学校的东、南、西、北面各是什么地方？

师根据学生的回答点出东、南、西、北四个字。

绘制平面图时，我们通常按照什么规定来绘制？（上北、下南、左西、右东）生答，师指。

“四面八方”中的八方指的是八个方向，还有四个方向是什么呢？想不想了解？

今天，我们就进一步学习认识方向。板书课题：认识方向。

二、自主探索，交流共享：

1、教学例题

（出现超市）提问：你知道超市在学校的哪一面吗？（东北面）为什么超市在学校的东北面？（因为超市在学校的东面和北面之间）

谁还会说一说的？

也就是说，东面和北面之间的方向就是（东北）方向。

（出现公园）提问：公园在学校的哪一面？为什么？（西南面，因为公园在学校的西面和南面之间）西面和南面之间的方向称为（西南）面

（出现体育场和人民桥）提问：它们分别在学校的哪一面？

指名答。（学生汇报时，先问一问为什么，再出现“东南”、“西北”和“西南”字，如果学生说出如“北东”、“南西”这样的方向，也要先问一问为什么，然后教师纠正：南面和东面的中间也可以说是南东，但按习惯应该说东南，不说南东。）

在学校的周围有那么多的建筑物，你最感兴趣的是哪个，同桌相互说说它的位置。

三、反馈完善：

1、“想想做做”第2题

administeri ng the part y, first of all, to exalt the party Constit ution, and pi pe the w hol e party, t he ruli ng party of the party Constituti on. Revered Constituti on reflecte d in awe. Party a party of ideal s and beli efs pur pose, summe d up t he party's fine tradition and style; a cl ear party members a nd w ha t can be done and what must be done, what cannot be done. Ea ch Communi st Party Constituti on to a we and wary eye enhancing t he sa cred se nse of responsibility a nd mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according t o the Constit ution of dire ction t owards standards effort s. Respect reflecte d in the study the party Constitution means. Some party members joi ned t he party Constit ution on t he shelf, not to lear n, some l ong-term party according to the Constituti on of the party's orga nization, the part y is not required to pay membership dues, l oose concept, party organizati ons of the party organizati on, a nd tur ned a blind eye on the tasks assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons6

carried out "practi ce line pioneer sta ndar d, and post spurs" "members concentrated service m onths", activities, e ducation guide members always ev erywhere beari ng in mind ide ntity, ba sed job post, a ctive play rol e. To devel op differentiated learni ng educati on gui de party members in a ccorda nce with their o wn sit uation, target the problems to, base d on the work done. Pay attention to t he room and r oom for grass-r oots party organizations, grass-root s party organizations have m ore autonomy in e ducation, making educati on more gr ound, full of vitality, good effect. Finall y, hig hlight the normal long-term. To hig hlight the characteristi cs of recurrent educati on, with long flowi ng, continuous li ne of perseverance the perseverance to promote e ducational efforts to realize the party's ideol ogical a nd political construction of routi ne institutionalizati on. Wit h the party branch as t he base unit. Play the role of party branche s shoul d be, i s the key to educati onal succe ss. Ea ch bra nch must take strict e ducation a nd management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

在生活中，在陌生的地方，怎样来辨认方向？（看太阳，太阳升起的一方是东面；看北斗七星，有北斗七星的那一面是北面；看指南针）考一考大家有关指南针的知识：指南针的红色一端指向哪？（北面）白色一端指着哪？（南面）这就是一个指南针的图，你能将指南针上的八个方向填完整吗？打开书P23完成“想想做做”第2题。生独立完成，师巡视。指名汇报，集体校对。说说是怎么填的。

介绍一些有关指南针的小知识。

小结：古人为我们留下了很多文化和辉煌，祖国的未来要靠谁？所以，我们小朋友要从小开始努力，把祖国建设的更加繁荣、富强。

2、“想想做做”第3题

讲述：小动物们刚刚参加完了一年一度的春季运动会，现在要回家了你能帮它们找到各自的家吗？在书上连一连。

生独立完成，师巡视并指导。让学生上台指一指。集体校对。

3、“想想做做”第4题

讲述：下面老师带小朋友们到美丽的青山乡去看看，告诉你们吧，青山乡不仅美丽，还是一个水果之乡呢，想不想去看看？

（出现水库及8种水果的图片，水库在中间已贴好，8种水果排列在一边。）有哪些水果？指名答。

这些水果都是种在水库的四周的，你能根据老师的提醒，帮它们找到各自种植的地方吗？

师：橘子园在水库的南面；葡萄园在水库的东面；樱桃园在水库的东南面；西南面是苹果园；水库的西面是山楂园；桃园在水库的北面；水库的西北面是西瓜园。

梨园就种在水库的这个方向，你知道梨园在水库的哪一面吗？

指名答。

4、“想想做做”第5题

谈话：同学们，我们轻松一下，来玩个游戏，你能很快画出棋子跳到什么地方吗？自己画一画。集体交流。

5、动手做

认识生活中的八个方向

roken probl em, fill the short Board, so that t he majority of party member s and fully qualified, compre hensive skill s of grass-r oots party organizati ons, grass-root s party level upgrade. Comrade s, do a "two" learning e ducation is of great signifi cance, responsi bilities, carry signifi cant impli cations. City levels party and general member s cadre s, to deep awar eness "two learn a do" lear ning educati on of importance and ne ed, to height of politica l consciously and full of political e nthusiasm, put "two lear n a do" learning e ducation carrie d out g ood, for coordi nation advance "four a full" strategy layout, and a chieve d "Thirtee n-Five" good start, a nd spee d up construction more hig h ecologi cal vitality ha ppi ness of City provi des strong powerful guarantee. Two, starting from the revered Constituti on respe cted the party Constituti on wa s XI Jinping, General Secretary to the party's request, 18 six ple nary session of the Central Commission for discipline i nspecti on report "five experience" first. Full strictly administeri ng the part y, first of all, to exalt the party Constit ution, and pi pe the w hol e party, t he ruli ng party of the party Constituti on. Revered Constituti on reflecte d in awe. Party a party of ideal s and beli efs pur pose, summe d up t he party's fine tradition and style; a cl ear party members a nd w ha t can be done and what must be done, what cannot be done. Ea ch Communi st Party Constituti on to a we and wary eye enhancing t he sa cred se nse of responsibility a nd mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according o the Constit ution of dire ction t owards standards efforts. Respect reflecte d in the study the party Constitution means. Some party members joi ned t he party Constit ution on t he shelf, not to lear n, some l ong-term party according to the Constituti on of the party's orga nization, the part y is not required to pay membership dues, l oose concept, party organizati ons of the party organizati on, a nd tur ned a blind eye on the tasks

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, t hi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons7

initiatives

我们已经能够在平面图上熟悉地认识了8个方向，在现实生活中这8个方向你们也能认识吗？

请小朋友们面朝教室的北面站好，并让方向板上的北对着教室的北面。根据老师说的方向，指一指。

师：教室的东北面、东南面、西北面、西南面。

四、全课总结：

今天学到了哪些知识？在平面图中怎样记住这八个方向？实际生活中怎么辨认这八个方向？

五、课堂作业

教学反思

第4课时

教学目标：

1、在具体的操作活动中，进一步加强方向感，提高认识路线图的能力。

2、在实际活动中加强小组合作能力，提高实际操作能力，同时体会成功的喜悦，感悟集体的力量。

3、在观察、解决实际问题的过程中，感悟数学与生活的密切联系，培养学生运用生活经验帮助思考的意识。

教学重难点：

认识方向，并读懂路线图。

教学用具：挂图。

教学过程：

一、情境导入：

提问：小朋友们，你们现在面对的是什么方向？（东面）

你能指出教室里其他七个方向吗？师问，生答并用手指一指。

请坐在教室中间的一位小朋友起立，分别请坐在他东面、西面、南面、北面的小朋友听口令起立。

揭示课题：测定方向

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons8

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

二、思索探究，交流共享：

辨认教材呈现的场景里的方向

小朋友们能辨认出各个方向，你能辨认出平面图中的方向吗？

出示场景图。从这幅图中，你看到了些什么？指名说。

以往我们看到的平面图，按什么规定绘制的？（上北、下南、左西、右东）看看这幅图中的正北方向和我们以往看到的有什么不同？

这幅图中的正方向在哪里？你是怎么知道的？

生观察后，指名答。（正北方向指向平面图的左上方，从指南针和小朋友的话中都能看出来。）

你能说说图中学校的景物各在小朋友的哪一面？思考，指名交流。

三、反馈完善：

在校园里定方向

平面图中的校园已经会测定方向了，你们想不想到我们的校园里去辨认一下方向？

师说要求：

请大家尽量保持安静，每一组带一本书、一枝笔。每五人一小组，商量一下，那么这组在校园的什么地方测定方向，然后分工测定，把表填好。看哪一组测的又快又好。

学生活动。

回班，整理表格。

汇报测定结果，大家给予评价。

四、全课总结：

请学生说一说测定方向的体会。

教学反思

initiatives

单元反思：

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons10

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

第四单元认识万以内的数

单元备课

教学目标：

1、经历数数的过程，体验数的发展。通过操作实践活动，初步理解几百几十几的数的含义，能认、读、写这些数，能识别各数位上数字表示的实际意义。

2、培养用数学的观念看周围事物的意识，培养与同学合作交流的态度和习惯。

3、掌握三位数的组成，理解百位、十位和个位上的数所表示的意思，能正确地读写三位数。

4、初步培养学生分析、比较、抽象概括的能力。培养认真观察、思索的良好的学习习惯。

5.认识算盘各个部分的名称，掌握下珠和上珠在档位上面表示的意义。

6.能正确掌握读写算盘上面表示的数，会拨出指定的数。

7.培养学生不怕困难、勇于探索的精神，提高小组合作的能力。

8.使学生借助于算盘读写数的能力有进一步的提高，培养学生形成正确的数感，掌握数的组成，能用数的组成进行相应的口算。

9.使学生发现问题、解决问题的能力有更进一步的提高，培养学生勇于探索知识的能力。

10.使学生能够借助于算盘经历数数的过程，掌握万以内的数的组成，增强万以内的数的数感，并能正确读写没有0和末尾有0的四位数。

11.使学生经历操作、观察、比较等数学活动中，学会与他人合作解决问题，培养学生合作的意识。

12.掌握四位数中间和末尾同时有0、中间有两个0的数的读写。

13.培养学生遇到困难时敢于探索，在小组活动时能主动合作、积极思考的数学素养。

14.使学生更清楚地了解万以内数的顺序，并掌握比较数的大小的方法。

15.通过与生活实际相联系的开放性教学，增强数学应用意识，提高解决实际问题的能力，并从解决问题的过程中获得成功的体验，树立起学习数学的信心。

16.在动手操作，自主探索，合作交流的学习过程中培养良好的数学学习习惯。

17.通过准确数与近似数的比较，理解近似数的含义。

18.初步知道准确数与近似数的区别，会正确辨别准确数与近似数，并会恰当

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substan ce, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plement the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" m embers 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educat onal i nteraction. In short, through soli d and effective w ork

initiatives

选用近似数。

19.通过学生的数据收集与交流，能对近似数和准确数互相转化。

20.体会近似数在生活中的作用，体验数学与生活的密切联系。

教学重点：

1.理解几百几十几的数的含义，能认、读、写这些数，能识别各数位上数字表示的实际意义。

2.三位数的写法和读法。

3.掌握读写算盘上面表示的数，会拨出指定的数

4.利用数的组成进行读写数及相应的口算。

5.会读写万以内的数（没有0和末尾有0），知道数的组成，掌握数位顺序表。

6.中间有0、末尾有0的数的读写。

7.会比较万以内数的大小。

8.理解近似数的含义。

教学难点：

1.末尾有0和中间有0的数的读写。

2.1－9在算盘上面怎样表示。

3.能利用数的组成去探索开放性的问题。

4.体会万以内的数的数位意义，知道相邻数位之间的十进制关系。

5.位数相同，最高位上的数也相同的两数的大小比较的方法。

6.合理地取近似数。

教具准备：

算盘、课件。

课件、计数器、算盘

课时安排：

11课时

第1课时

教学目标：

2、培养用数学的观念看周围事物的意识，培养与同学合作交流的态度和习惯。roken probl em, fill the short Board, so that t he majority of party member s and fully qualified, compre hensive skill s of grass-r oots party organizati ons, grass-root s party level upgrade. Comrade s, do a "two" learning e ducation is of great signifi cance, responsi bilities, carry signifi cant impli cations. City levels party and general member s cadre s, to deep awar eness "two learn a do" lear ning educati on of importance and ne ed, to height of politica l consciously and full of political e nthusiasm, put "two lear n a do" learning e ducation carrie d out g ood, for coordi nation advance "four a full" strategy layout, and a chieve d "Thirtee n-Five" good start, a nd spee d up construction more hig h ecologi cal vitality ha ppi ness of City provi des strong powerful guarantee. Two, starting from the revered Constituti on respe cted the party Constituti on wa s XI Jinping, General Secretary to the party's request, 18 six ple nary session of the Central Commission for discipline i nspecti on report "five experience" first. Full strictly

administeri ng the part y, first of all, to exalt the party Constit ution, and pi pe the w hol e party, t he ruli ng party of the party Constituti on. Revered Constituti on reflecte d in awe. Party a party of ideal s and beli efs pur pose, summe d up t he party's fine tradition and style; a cl ear party members a nd w ha t can be done and what must be done, what cannot be done. Ea ch Communi st Party Constituti on to a we and wary eye enhancing t he sa cred se nse of responsibility a nd mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according t o the Constit ution of dire ction t owards standards effort s. Respect reflecte d in the study the party Constitution means. Some party members joi ned t he party Constit ution on t he shelf, not to lear n, some l ong-term party according to the Constituti on of the party's orga nization, the part y is not required to pay membership dues, l oose concept, party organizati ons of the party organizati on, a nd tur ned a blind eye on the tasks assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons12

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

教学重难点：

理解几百几十几的数的含义，能认、读、写这些数，能识别各数位上数字表示的实际意义。

教学过程：

一、情境导入：

谈话：小朋友们瞧，天使姐姐来了，她还带来了一些小方块（出示一个小方块、一条小方块），让学生分别说说它们所包含的小方块的个数。

（再出示“一板”小方块），你们想不想知道这“一板”有多少个小方块呢？

（1）让学生自由地数一数。

（2）同桌交流。

（3）汇报结果，并让学生说一说是怎样数的？

小结：可以先一个一个数，数出一条也就是10个一是1个十；再十个十个地数，数出一板有10条，也就是10个十是1个百。

追问：一板共有多少个小方块，也就是几个百。

二、思索探究，交流共享：

1、教学计数单位“百”和“千”，直观认识整百数和一千。

（1）分别出示“3板”小方块和“8板”小方块。

（2）提问：我们已经知道“一板”小方块是一百，那“3板”小方块是几个一百，是几百呢？“8板”小方块是几个一百，是几百呢？

A、学生独立思考后交流看法。

B、汇报结果。

2、认数。

（1）谈话：数的王国里有座智慧城堡，只要你肯动脑筋，就能得到“智慧星”，想要吗？

（2）出示方块图（3堆2条），问：一共有几个小方块？（320个）你是怎么知道的？320里面有几个百和几个十呢？

（3）又增加了4个小方块，让学生猜一猜这时一共有几个小方块呢？（324个）同桌交流，你是怎么知道的？

（4）谈话：我们用计数器来拨一拨好吗？同桌合作，拨计数器，并读一读这个数。

（5）提问：324中的“3”表示什么？“2”呢?“4”呢？324是由哪几部分roken probl em, fill the short Board, so that t he majority of party member s and fully qualified, compre hensive skill s of grass-r oots party organizati ons, grass-root s party level upgrade. Comrade s, do a "two" learning e ducation is of great signifi cance, responsi bilities, carry signifi cant impli cations. City levels party and general member s cadre s, to deep awar eness "two learn a do" lear ning educati on of importance and ne ed, to height of politica l consciously and full of political e nthusiasm, put "two lear n a do" learning e ducation carrie d out g ood, for coordi nation advance "four a full" strategy layout, and a chieve d "Thirtee n-Five" good start, a nd spee d up construction more hig h ecologi cal vitality ha ppi ness of City provi des strong powerful guarantee. Two, starting from the revered Constituti on respe cted the party Constituti on wa s XI Jinping, General Secretary to the party's request, 18 six ple nary session of the Central Commission for discipline i nspecti on report "five experience" first. Full strictly

initiatives

组成的？

（7）即时训练：同桌合作，在计数器上拨324和432，读一读，说一说。2、数数。

（1）：调皮的皮卡丘搬来了小方块，让小朋友一起跟着数一数每一次一共有多少个小方块。（一个一个地数，从453数到459）

（2）讨论：再搬来一个小方块，一共有几个了呢？你能用计数器来拨一拨、说一说吗？小组讨论后全班交流。

（3）提问：459添上1是460，那么469添上1，479添上1……499添上1分别会是多少呢？

3、完成例2：同桌合作一边拨一边数

（1）一十一十地数，从三百五十数到四百六十。然后全班交流，重点说一说三百九十后面的数是多少？

（2）一个一个地数，从九百八十九数到九百九十九。然后全班交流，重点说一说九百八十九后面的数是多少？

（3）九百九十九添上1是多少？

（4）小组活动：一个一个地数，从988数到1000.

4、（1）出示计数器后提问：看着计数器谁能说一说从右边起第一位、第二位、第三位各是什么位？（学生边回答边对照计数器出示个位、十位、百位）（2）教师再问：那你们想知道从右边起的第4位是什么位吗？（学生回答后出现：从右边起第4位是千位）

（3）请小朋友看着自己读一读。

（4）提问：我们已经知道个位上的一颗珠表示1个一，十位上的一颗珠表示1个十，百位上的一颗珠表示1个百，那么千位上的一颗珠表示多少呢？（让学生掌握扩展后的数位顺序，进一步体会十进制计数法的位值原则，从而推想出千位上的一颗珠表示一个千）

5、出示“10板”小方块。

A、引言：小朋友们看，天使姐姐这里还有许多小方块，请你们一百一百地数一数，看一共有多少？

B、让学生伸出手指对着方块一百一百地数，当学生数到九百时教师问：九百再加一百是多少个一百呢？如果学生回答是10个一百，教师追问：10个一百是多少？

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons14

carried out "practi ce line pioneer sta ndar d, and post spurs" "members concentrated service m onths", activities, e ducation guide members always ev erywhere beari ng in mind ide ntity, ba sed job post, a ctive play rol e. To devel op differentiated learni ng educati on gui de party members in a ccorda nce with their o wn sit uation, target the problems to, base d on the work done. Pay attention to t he room and r oom for grass-r oots party organizations, grass-root s party organizations have m ore autonomy in e ducation, making educati on more gr ound, full of vitality, good effect. Finall y, hig hlight the normal long-term. To hig hlight the characteristi cs of recurrent educati on, with long flowi ng, continuous li ne of perseverance the perseverance to promote e ducational efforts to realize the party's ideol ogical a nd political construction of routi ne institutionalizati on. Wit h the party branch as t he base unit. Play the role of party branche s shoul d be, i s the key to educati onal succe ss. Ea ch bra nch must take strict e ducation a nd management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

C、将“10板”小方块合在一起，这时教师指着屏幕上的“大正方体”问：这个大正方体是多少个小方块组成的？（同桌相互说一说）再让学生闭上眼睛想一想表示一千的“大正方体”是什么样的。

由此明确：千也是一个计数单位，这个计数单位可用一个大正方体表示。

追问：10个百就是多少？一千里面有几个百？

（4）提问：你能不看屏幕一百一百地数，数到一千吗？

（5）引言：小朋友，天使姐姐看到大家学得这么认真非常高兴，她不停地伸出大拇指夸奖你们呢！不过，天使姐姐想出几道题来考考大家，你们敢应战吗？

A、出示“几板”小方块让学生说出是几百。

B、说几百，让小朋友想像出是“几板”小方块。

三、反馈完善：

1.完成“想想做做”第1题。

课件出示题目后，让学生用计数器进行边拨珠边数数。

2.完成“想想做做”第2题。

利用计算器你们会数数，没有计算器你们会数数吗？

学生交流、得出答案。

3.完成“想想做做”第3题。

课件出示小棒图后问：这个图中几个百？几个十？和几个一？

集体交流，总结答案。

4.完成“想想做做”第4题。

课件出示题目，提问：有几个百？几个十？几个一？

小组合作，集体探究讨论。

5.完成“想想做做”第5题。

课件出示图后问：图中有几种面值的人民币？你会统计它们各有多少张吗？这些人民币一共有多少元？

小组合作，得出结论。

6.完成“想想做做”第6题。

提问：老师拨出一些数，你们能不能说出它的组成？这个数是多少？

课件出示图后问：你能看出这两幅图中有什么相同和不同的地方吗？它们表示的意义一样吗？

roken probl em, fill the short Board, so that t he majority of party member s and fully qualified, compre hensive skill s of grass-r oots party organizati ons, grass-root s party level upgrade. Comrade s, do a "two" learning e ducation is of great signifi cance, responsi bilities, carry signifi cant impli cations. City levels party and general member s cadre s, to deep awar eness "two learn a do" lear ning educati on of importance and ne ed, to height of politica l consciously and full of political e nthusiasm, put "two lear n a do" learning e ducation carrie d out g ood, for coordi nation advance "four a full" strategy layout, and a chieve d "Thirtee n-Five" good start, a nd spee d up construction more hig h ecologi cal vitality ha ppi ness of City provi des strong powerful guarantee. Two, starting from the revered Constituti on respe cted the party Constituti on wa s XI Jinping, General Secretary to the party's request, 18 six ple nary session of the Central Commission for discipline i nspecti on report "five experience" first. Full strictly administeri ng the part y, first of all, to exalt the party Constit ution, and pi pe the w hol e party, t he ruli ng party of the party Constituti on. Revered Constituti on reflecte d in awe. Party a party of ideal s and beli efs pur pose, summe d up t he party's fine tradition and style; a cl ear party members a nd w ha t can be done and what must be done, what cannot be done. Ea ch Communi st Party Constituti on to a we and wary eye enhancing t he sa cred se nse of responsibility a nd mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according o the Constit ution of dire ction t owards standards efforts. Respect reflecte d in the study the party Constitution means. Some party members joi ned t he party Constit ution on t he shelf, not to lear n, some l ong-term party according to the Constituti on of the party's orga nization, the part y is not required to pay membership dues, l oose concept, party organizati ons of the party organizati on, a nd tur ned a blind eye on the tasks

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, t hi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons15

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substan ce, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plement the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" m embers 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educat onal i nteraction. In short, through soli d and effective w ork

initiatives

四、全课总结：

谈话：今天，小朋友们表现得真不错，谁来说说自己的收获？

小朋友们，生活中处处有数学，你们一定要做有心人，多观察、多思考，去发现更多的数学奥秘，你们愿意吗？

五、课堂作业

教学反思

第2课时

教学目标：

1、掌握三位数的组成，理解百位、十位和个位上的数所表示的意思，能正确地读写三位数。

2、初步培养学生分析、比较、抽象概括的能力。培养认真观察、思索的良好的学习习惯。

教学重点：

三位数的写法和读法。

教学难点：

末尾有0和中间有0的数的读写。

教学过程：

一、先学探究

1.一个一个地数，从489数到50

2.数位顺序表：我们已经学习过哪些数位？它们的排列顺序是怎样的？

3.读写两位数。

（1）师在计数器上面拨出46，提问：这个数怎样读？为什么这样读？怎样写呢？师在学生回答讨论后总结：这个数的十位上面是4，读作：四十，在十位上面写4；个位上面是6，我们读作：六，在个位上面写6.

（2）师在计数器上面演示：拨去刚才个位上面的6个算珠问：这个数读作什么？怎样写？

引导小结渗透：末尾的0不读，但是要写。

二、交流共享

administeri ng the part y, first of all, to exalt the party Constit ution, and pi pe the w hol e party, t he ruli ng party of the party Constituti on. Revered Constituti on reflecte d in awe. Party a party of ideal s and beli efs pur pose, summe d up t he party's fine tradition and style; a cl ear party members a nd w ha t can be done and what must be done, what cannot be done. Ea ch Communi st Party Constituti on to a we and wary eye enhancing t he sa cred se nse of responsibility a nd mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according t o the Constit ution of dire ction t owards standards effort s. Respect reflecte d in the study the party Constitution means. Some party members joi ned t he party Constit ution on t he shelf, not to lear n, some l ong-term party according to the Constituti on of the party's orga nization, the part y is not required to pay membership dues, l oose concept, party organizati ons of the party organizati on, a nd tur ned a blind eye on the tasks assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons16

management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

1.教学例3.

（1）师在计数器上面拨出500问：这个数百位上面是几个算珠？表示什么？怎样写？怎样读？十位上有几个算珠？怎样写？要不要读？个位上呢？引导学生得出：5个百是500，读作五百。

（2）师在计数器上面拨出534问：这个数是由（）个百、（）个十和（）个一组成的？百位上怎样写？怎样读？十位上怎样写？怎样读？各位呢？

（3）师在计数器上面拨出1000.问：这个数是由什么组成，读作什么？

预设A：有学生会读，就让他说出怎样读的？为什么这样读。

预设B：没有学生会读，师问：这个数是由（）个千组成的，怎样写？怎样读？哪几个数位没有？怎样写呢？怎么读？

出示例3的3幅图，请学生思考：我们读写千以内的数的时候都是从哪个方向开始的？

末尾有0的时候，我们怎样写？要不要读？

总结：读千以内的数都是从左边开始读写的，也就是从最高位开始读写的，末尾有0的时候，我们不读，但是要写，并板书。

2.教学“试一试”

出示“试一试”后问：这两幅图有什么相同的和不同的？请你们在小组里面讨论。小组汇报后总结：

左图的末尾没有算珠，只写不读。

右图的中间没有算珠，既写又读。

三、反馈检测

1.完成“想想做做”第1题。

提问：从图上面你能看出来是怎样数数的吗？你会一百一百地数数吗？

学生回答后填数轴。

师问：200和700，哪个数比较接近1000？

2.完成“想想做做”第2题。

学生独立完成后交流：中间的0又读又写，末尾的0只写不读。

3.完成“想想做做”第3题。

出示后指名作答，集体评价。

师问：如果让你们给这四个数分类的话，你准备怎样分？

师相机导出：400后面的0跟250后面的0都属于末尾的0，只写不读。

initiatives

4.完成“想想做做”第5题。

学生读题后师问：573的3表示几个几？跟哪个方块图相连？306的3呢？230的3呢？

学生交流、合作完成练习。

5.完成“想想做做”第6题。

学生独立完成后师生讨论解题规律。

6.完成“想想做做”第4题。

独立完成后集体评价。

四、课堂总结

这节课我们学习了哪些内容？有什么收获和体会？

我们读写数时要从哪儿开始？千位上是几就读几千，百位上是几就读几百，个位上是几就读几。如果中间有一个0就直接读零，末尾不管有几个0都不读。

五、课堂作业

教学反思：

第3课时

教学目标：

1.认识算盘各个部分的名称，掌握下珠和上珠在档位上面表示的意义。

2.能正确掌握读写算盘上面表示的数，会拨出指定的数。

3.培养学生不怕困难、勇于探索的精神，提高小组合作的能力。

教学重点：

掌握读写算盘上面表示的数，会拨出指定的数。

教学难点：1~9在算盘上面怎样表示。

教具准备：算盘、课件。

教学过程：

一、情境引入

教师拿出算盘说：老师今天带来一位新朋友，看你们认识他吗？

今天这节课我们就来通过算盘认识千以内的数。

二、交流共享

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons18

carried out "practi ce line pioneer sta ndar d, and post spurs" "members concentrated service m onths", activities, e ducation guide members always ev erywhere beari ng in mind ide ntity, ba sed job post, a ctive play rol e. To devel op differentiated learni ng educati on gui de party members in a ccorda nce with their o wn sit uation, target the problems to, base d on the work done. Pay attention to t he room and r oom for grass-r oots party organizations, grass-root s party organizations have m ore autonomy in e ducation, making educati on more gr ound, full of vitality, good effect. Finall y, hig hlight the normal long-term. To hig hlight the characteristi cs of recurrent educati on, with long flowi ng, continuous li ne of perseverance the perseverance to promote e ducational efforts to realize the party's ideol ogical a nd political construction of routi ne institutionalizati on. Wit h the party branch as t he base unit. Play the role of party branche s shoul d be, i s the key to educati onal succe ss. Ea ch bra nch must take strict e ducation a nd management responsibility of party members, e ducation base d on learni ng to make specific arra ngements, ful ly mobili ze the e nthusiasm of party member s involve d in the education, e nsure t he Orga nization in place, mea sures i n pla ce, put in place. To t he party orga nization as the basi c form. In t he standar dized development of learning, make learning mor e effective efforts, and w ill adhere to the good party group, organize d party, party members a nd the General Assembly, tell a good party lecture s, ca n drive a good t opi c about, preve nt showy wit hout substance, Sham mul es. To impleme nt the education management sy stem for basic support. Democratic mutua l evaluation on party members i n accor dance with t he regulati ons, the real performance criteria a nd or der esta blished, sound carefully di spose of unqualified party members, to furt her improve t he dre dge export team, pur e self cleani ng mechani sm. Party leadi ng ca dres should a dhere t o and im plem ent the ce ntral group l earni ng system, to whi ch branch of learning exchange s, parti cipation in a dual organizati on wit h comrades. Focus on re curre nt education, you also nee d to contin ue to stre ngthe n the buil ding of grass-roots party orga nizations. Now, the city also has 88 village party organizations are we ak and lax, first Secretary of the village, but conversion re quires a process. Recentl y, the city's party orga nization focuse d investigation, check out a total of "lost" members 4,507, "Pocket" members 1037, find t here are 640 "lost" party members are not contacte d 148 "Pocket" party members a nd impl ementation of organi zational relationshi ps. Educati onal ma nagement of party members into t he Organi zation, there i s a lot of work to do. Weak and lax party continued re organizati on as a n important task, finish perfe ct organizati on, with a good team, Good system. Spe cial hig hlights of grass-r oots party organizati ons, to be dealt with first i n place, further e ducation, reorgani zation, transformation and educati onal i nteraction. In short, through soli d and effective w ork

initiatives

1.教学例4.

（1）认识算盘。

提问算盘上面有什么？

根据学生的回答出示课件：课件上面动态介绍算盘各个部分的名称。在介绍档位的同时从右往左分别介绍各位档、十位档、百位档、千位档。

你们认识它了吗？请你们摸一摸、指一指、说一说。小组里面和你的同桌分享一下你刚学习到的算盘部件的名称。

教师边指边问，学生独立回答。

（2）学习在算盘上面表示1~9.

师：计数时，我们要拨珠靠着中间的梁，只有靠着梁的算珠才能参加计数。一个下珠表示1，一个上珠表示5，师边拨珠边板书。

出示教材上“下面算盘上表示的数各是多少？”请学生在小组里讨论一下。

学生充分讨论后集体评价后教师引出：

第1幅图：个位档上面的算珠是4，表示有4个一。

第2幅图：十位档上面的算珠是3，表示有3个十；个位档上面的算珠是7，表示有7个一。

第3幅图：十位档上面的算珠是6，表示有6个十；个位档上面没有。

第4幅图：百位档上面的算珠是8，表示有8个百。十位档上面没有，个位档上面的算珠是2，表示有2个一。

第5幅图：百位档上面是9，表示有9个百。

你会写出这些数吗？请你们在教材第34页上面做一做。

学生独立完成后，教师组织集体评价。

2.学拨珠。

我们看刚才的图，你能在上面的几幅图中找出1~9的数吗？你会在个位上面拨出1~9的数吗？出示例4的两幅图和下面的五福图。

学生尝试拨珠，教师巡视帮助有困难的学生，并收集反馈信息。

下面我们跟着教师后面拨一拨，教师示范正确的手势拨珠。

学生在小组里面拨一拨，掌握正确的拨珠手势。

3.试一试

出示试一试。

提问：你会拨吗？请你们在小组里面拨一拨，数一数。

roken probl em, fill the short Board, so that t he majority of party member s and fully qualified, compre hensive skill s of grass-r oots party organizati ons, grass-root s party level upgrade. Comrade s, do a "two" learning e ducation is of great signifi cance, responsi bilities, carry signifi cant impli cations. City levels party and general member s cadre s, to deep awar eness "two learn a do" lear ning educati on of importance and ne ed, to height of politica l consciously and full of political e nthusiasm, put "two lear n a do" learning e ducation carrie d out g ood, for coordi nation advance "four a full" strategy layout, and a chieve d "Thirtee n-Five" good start, a nd spee d up construction more hig h ecologi cal vitality ha ppi ness of City provi des strong powerful guarantee. Two, starting from the revered Constituti on respe cted the party Constituti on wa s XI Jinping, General Secretary to the party's request, 18 six ple nary session of the Central Commission for discipline i nspecti on report "five experience" first. Full strictly administeri ng the part y, first of all, to exalt the party Constit ution, and pi pe the w hol e party, t he ruli ng party of the party Constituti on. Revered Constituti on reflecte d in awe. Party a party of ideal s and beli efs pur pose, summe d up t he party's fine tradition and style; a cl ear party members a nd w ha t can be done and what must be done, what cannot be done. Ea ch Communi st Party Constituti on to a we and wary eye enhancing t he sa cred se nse of responsibility a nd mission. Hearts filled with party Constitution, hold the party line, BA obligations unconditionally carry out party members, according o the Constit ution of dire ction t owards standards efforts. Respect reflecte d in the study the party Constitution means. Some party members joi ned t he party Constit ution on t he shelf, not to lear n, some l ong-term party according to the Constituti on of the party's orga nization, the part y is not required to pay membership dues, l oose concept, party organizati ons of the party organizati on, a nd tur ned a blind eye on the tasks

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, t hi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons19

initiatives

汇报拨珠，师指名学生到前面当小老师，其他同学跟在后面拨。边拨边数。

三、反馈检测

1.完成“想想做做”第1题。

你能看出各个数位档上面是几吗？师指名依次回答。

你能读一读算盘上面表示的数吗？会写吗？请你们边读边在教材上面写一写。

2.完成“想想做做”第2题。

学生独立完成后师问：末尾有0的是哪几幅图？上面读作什么？中间有0的呢？

3.完成“想想做做”第3题。

先读数，再拨数，请同桌的互相读一读、拨一拨。

4.完成“想想做做”第4题。

做游戏，让学生小组一人说数，另外几个组员拨数，看谁拨得又对又快。

四、课堂总结

提问：今天这节课学习了什么？归纳：你有什么收获和体会？

归纳：

1.算盘各个部分的名称。

2.上珠下珠各表示几。

3.学会在个位上面拨出1~9.

五、课堂作业

教学反思：

第4课时

教学目标：

1.使学生借助于算盘读写数的能力有进一步的提高，培养学生形成正确的数感，掌握数的组成，能用数的组成进行相应的口算。

2.使学生发现问题、解决问题的能力有更进一步的提高，培养学生勇于探索知识的能力。

教学重点：

assigne d by the Organizati on, w ere forgotten, forgotten v ows performance the party Constitution. Constitution is the fundame ntal standard of our Communist s are slim, the party Constituti on to re peatedly l earn, practice, think ing, lear ning a nd thinki ng, thi nking and row, row, ever-spirali ng increase i n the lear ning process. Respe ct party line s reflected i n practi ce. Tw o to learn a basi c Constituti on Party rules, series of spee che s, the key to be qualified party member s. To be qualified party members, sta ndar ds are not high, but if he doe s take a ruler of the party Constituti on to "card", truly it is not easy. Carry out st udy a nd educati on, ev ery party must control t he party's eig ht obligations, ask, l ook for gaps, ide ntify probl ems, cle ar directi on, work to solve specifi c problems. Actively practi cing i n the producti on life of the eig ht obl igations, to play a va nguard a nd exempl ary role, tr uly a party ba nner. "Two" fight to highlig ht grass-r oots party organizati ons20

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