最新大班科学简单统计教案 大班数学分类统计教案(28篇)
作为一位杰出的老师,编写教案是必不可少的,教案有助于顺利而有效地开展教学活动。既然教案这么重要,那到底该怎么写一篇优质的教案呢?以下是小编收集整理的教案范文,仅供参考,希望能够帮助到大家。
大班科学简单统计教案 大班数学分类统计教案篇一
认识中位数
教科书第80~81页的例3、例4,“练一练”和练习十六的第2、3题。
1.使学生结合具体实例初步理解中位数的意义,会求一组简单数据的中位数,能具体问题选
择合适的统计量表示一组数据的整体特征。
2.使学生在初步理解中位数的过程中,进一步体会数据对于分析问题、解决问题的作用,感受与同学交流的意义和乐趣,发展统计观念。
初步理解中位数的意义。
能跟据正比例的意义判断两种相关联的量是否成正比例的量。
:多媒体
1.出示例3:四年级一班9个男生1分钟跳绳成绩记录单。
观察数据,说说你对这组数据的看法。
2.讨论:你认为7号男生的成绩在这组同学中处于什么位置?
小结:可以先算出这组数据的平均数,用7号男生的成绩与平均数进行比较;也可以按一定的顺序把这组男生的成绩重新排一排,看7号男生的成绩排在第几名。
为什么7号男生跳的下数比平均数少,成绩还排在第三名?你认为用平均数代表这组
男生跳绳的整体水平合适吗?
为了更好地表示这组数据的整体特征,我们需要认识一种新的统计量——中位数。(板书)
1.你能把这组数据按从小到大或从大到小的顺序重新排一排吗?
引导:这组数据一共有几个?处于正中间位置的是哪个数据?
“102”的前面有几个数据?后面呢?
指出:这组数据中,正中间的一个数是102,102是这组数据的中位数。
把7号男生的成绩与中位数比较,你觉得该生的成绩怎么样?
2.你认为用中位数表示这组数据的整体特征合适,还是用平均数表示合适?学生交流。
3.出示例4:四年级一班10个女生1分钟跳绳成绩记录单。
你会求这组数据的中位数吗?试一试。
这组数据一共有多少个?处于正中间位置的有几个数据?正中间有两个数时,中位数怎样求呢?讨论:同中位数比,10号女生的成绩怎么样?其他女生呢?
1.指导完成“练一练”
各自求出这组数据的平均数和中位数。
讨论:用哪个统计量代表这组同学家庭住房的整体水平比较合适?为什么?
思考:这组数据的平均数为什么会比中位数低得多?
2.指导完成练习十六第2题
分别算出八架飞机飞行时间的平均数和中位数。
讨论:用哪个数据代表这八架飞机飞行时间比较合适?
3.练习十六第3题
分别算出这组数据的平均数、中位数和众数。
讨论:你认为用哪个数据代表这个公司员工3月工资的实际情况比较合适?
谁愿意总结一下这节课我们学习了哪些知识?你们的收获是什么?
完成《练习与测试》相关作业
板书设计:
认识中位数
大班科学简单统计教案 大班数学分类统计教案篇二
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大班科学简单统计教案 大班数学分类统计教案篇三
1.乐意与同伴交流学习过程,体验同伴互助的快乐。
2.初步认识统计表,能根据统计图表中的数据提出并回答简单的问题。
3.学会用统计的方法认识事物(事件)。
4.进一步提高幼儿对数学活动的兴趣及动手操作能力.
5.激发了幼儿的好奇心和探究欲望。
会用简单的方法收集数据。
在实际操作中体会和感受统计的过程,体验从实物分类整理到表格统计的过程。
动物面具四个、水果图片四个、统计表、方片若干
1.教师:昨天,老师收到了森林国王的一封信,邀请我们班的小朋友参加他们的化妆舞会,你们想不想去呀?不过我想看看男孩子多还是女孩子多。你们有什么办法能一眼就看出来吗?请幼儿思考用什么办法解决这个问题。
2.幼儿自由讨论,交流方法,推出一种方便又快捷的方法。(引出统计图,初步了解统计图)
3.小结:原来这个统计图可以又快有准确的看出男孩多还是女孩多。
1.教师:在舞会上每位小朋友都要戴上面具,老师为你们准备了四种面具(教师出示四种动物面具,分别是:老虎、熊、兔子和青蛙),你们喜欢哪一种?
2.请小朋友们自由选择。
3.小朋友们喜欢的面具都不相同,老师不知道每种面具要做准备多少个,怎么办呀?
4.请幼儿在喜欢的面具下面贴方片,再数一数,就可以知道每种面具各有多少个了。
5.师生共同整理,教师画出统计表。
1.教师:舞会上还得准备点水果,那我们带上一些吧!老师准备了四种水果,请小朋友们帮助老师统计需要各种水果的数量(教师出示四种水果:苹果、桔子、梨和西瓜)。
2.请小朋友们自由选择水果,找出小组最喜欢的水果。
3.整理并完成统计表,找出大家最喜欢的水果。
小结:小朋友们,我们在舞会的准备中学习了一个很重要的数学知识——统计(板书课题),填写的表格就叫统计表,我们通过统计知道了小朋友喜欢什么面具,喜欢吃什么水果,统计的用处可真大呀。
小百科:统计是汉语中的“统计”原有合计或汇总计算的意思。英语中的“统计” (statistics) 一词来源于拉丁语status,是指各种现象的状态或状况。
大班科学简单统计教案 大班数学分类统计教案篇四
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大班科学简单统计教案 大班数学分类统计教案篇五
1、会根据统计的要求,收集、整理数据,并能制作统计表。
2、能根据统计表作出分析、预测或判断和决策。
3、培养学生统计的意识,并能应用统计的方法解决简单的实际问题。
4、让学生体验统计的过程,感悟统计的方法。
学会收集、整理数据,并学会制作简单的统计表。
怎样去实际收集数据,能根据统计表作出预测或决策。
一、统计本班学生双休日最喜欢的活动情况。
1、同学们,双休日你最喜欢的活动是什么?
根据学生回答,教师整理并板书:体育运动、玩电脑、学音乐、看书学习、出去旅游。
2、怎么知道大家双休日最喜欢的活动是什么呢?(生:要进行调查和统计)
(板书课题:简单的统计)
3、怎样进行统计呢?(讨论得出:可以划正字,或举手数一数等)
4、请小组统计员统计每种情况的人数。(各组当堂推选出统计员,要求进行统计)
5、师总结:刚才统计员通过举手数出了每种情况的人数,这个过程叫收集数据,为了科学准确,要做到不重复,不遗漏。(板书:收集数据,不重复,不遗漏)
6、请大统计员把每种情况的人数进行分类整理,把各种情况的人数加起来(指定全班统计员整理并合计)。这个过程叫整理数据(板书:整理数据)
7、把统计出来的数据整理到一张表格里去,这张表格叫做统计表,叫什么统计表呢?(xx班星期天最喜欢做什么的情况统计表)。学生回答每种情况的人数,教师填好统计表,并填好合计人数。是什么时间制作的?(注上制表时间)。这个过程叫做制作统计表。
8、看了这张统计表,你发现什么?想到什么?
刚才我们对这张统计表进行了分析,并做出了判断、预测和决策。(板书:进行分析,判断、预测和决策)
9、 你统计了我们一个班的情况,得到的信息是否就很准确呢?还要统计什么?(还要统计其他班级的情况)。统计的数据越多,我们得到的情况就越准确。
【评析:统计在日常生活中随处可见,学生已有了一定的生活经验,教者从学生的生活实际出发,选取学生最感兴趣的话题双休日最喜欢的活动作为切入口,使学生感到统计就在自己的身边,激发学生学习的动机。通过对情况的真实分析,引发学生的真情流露,学生想说敢说,非常投入。教师注意把统计的过程随教学过程充分展示出来,渗透自然,学生乐于接受。对统计表的分析注意了开放性,让学生扮演统计员的角色,师生互动、生生互动,充分发挥了学生的主动性、参与性,学生经历了知识的产生、形成、发展和再创造的过程,使课堂成了学生主动探究的乐园。】
二、统计听课老师双休日最喜欢的活动情况。
今天来了许多听课老师,老师们在双休日最喜欢的活动是什么?你打算怎样知道听课老师最喜欢的活动是什么?(统计)怎样进行统计呢?
(1)请每小组打开信封,看一遍,要求我们干什么?
(2)请每个小组商量一下,怎样合作统计?
(3)学生汇报打算怎样调查。怎样问老师?(提醒学生要有礼貌)
(4)学生到听课教师中去调查统计,收集数据。
(5)填好手中的统计表,汇报统计情况,你得出什么预测?
(6)把同学们和老师们星期日里最喜欢做什么的两张统计表能否合在一起。(教师把数据合在一张统计表中)你发现什么?
【评析:本环节教师注意让学生亲身体验统计的过程,在统计活动中,感悟统计的价值。(1)让学生把学到的统计方法应用到实际统计活动之中,随学随用,每个学生都兴趣盎然地投入到活动中去,学生真切地感受到数学就在自己身边,做到了数学问题生活化,生活实际数学化。(2)以小组合作交流的形式探讨统计的方法,学生畅所欲言。统计的办法是学生想出来的,数据是学生自己动手收集出来的,发挥了学生的主动参与性,培养了合作意识和合作精神。(3)对学生双休日活动情况统计表与教师双休日活动统计表进行对比分析,并把二者合二为一,学生预测的准确、分析的透彻,培养了学生分析判断和推理能力。】
三、实际上统计在日常生活中应用非常的多。(分别出示多张统计表)
i.南京造地铁,选择颜色一张调查统计表。你发现什么?
ii.第十四届亚运会前四名获金牌情况统计表。你发现什么,想到什么?
iii.选举班长情况统计表,引导学生做出分析
iv.近几年来南京旅游的人数情况统计表。
【评析:选取的几个例子切合学生的实际情况,是刚刚发生的事情,是发生在自己身边的事情,学生分析的饶有兴致,既具有开放性,培养了发散思维能力,又增强了学生的爱国精神、民主意识等。】
四、自学课本(100页——101页)
a)出示思考提纲
i.原始数据表与数据统计表有什么不同?
ii.书上的三个小问题。
(1)观察统计表,说出喜欢每种球类活动的各有多少人?
(2)估计一下,在这个班级里组织什么球类比赛最受欢迎?
(3)你还能想到什么?
iii.制作统计表要注意什么?
b)学生合作交流上述问题。
c)学生汇报并补充。
【评析:教学过程不是教教材,而是在用教材教,在这里得到了很好的体现。教者不囿于教材,让教材焕发出生命的活力,特别是对原始记录表与统计表有什么不同这一问题的讨论,巩固了统计的过程,在比较原始记录表与数据统计表有什么不同时,孕伏了任何两种方法不存在对错之分,各有各的优越性,我们在实际使用时谁的最方便就最好。】
五、统计公路上汽车通过情况。(电脑出示马路过往车辆情况的场景)
i.这是车辆通过的情况,现在请大家进行统计,(学生统计失败)为什么无法统计?你有什么感觉?(太快),
ii.如果要你统计车辆通过的情况,该怎么办?
①需要去分类。(弄清要统计哪几种车辆)。②怎样收集数据?③怎样整理数据。④怎样画统计表?⑤分析一下结果。
iii.讨论一下怎样才能很快的统计出来?(如何分工)
iv.汇报你们分工的情况。通过活动你有什么想法?
v.从统计表中想到什么?知道什么?(人民生活水平提高、注意空气的污染情况等)
【评析:这一环节让学生想办法解决怎样统计动态的物体的问题,又一次让小组交流,发挥了团队的力量。通过虚拟的道路交通场景,学生尝试了统计的失败,又在教师分小组交流一下的话语点拨下,寻求出解决问题的办法,获得了统计的成功。教学中,教师尊重学生的生活经验和原有的认知水平,相信学生有解决问题的能力,有意培养学生的合作意识,真正地发挥了参与者、组织者、引导者的作用。】
六、用统计的方法解决身边的问题。
【评析:让学生自己举例,联想到用学过的统计知识如何解决身边的事情,学生发言踊跃,培养了应用知识解决实际问题的能力。】
七、作业:完成101页做一做,练习十二第1题。
【评析:在培养能力的同时,还重视了双基的落实。】
【总评:本节课从学生的现实生活出发,极力选取学生身边的事例,使生活素材贯串于整个教学的始终。注意将数学与学生生活紧密相连,遵循了数学源于生活、寓于生活、用于生活的理念。通过数学教学,实现了数学的应用价值。
一、从生活经验导入新课,使数学问题生活化。
心理学研究表明:当学习的内容与学生熟悉的生活背景越贴近,学生自觉接纳知识的程度就越高。课一开始,教师就从双休日同学们最喜欢的活动是什么的话题导入新课,从怎样知道每种活动有多少人最喜欢来切入主题。这样做使学生感到所学的内容不再是简单枯燥的数学,而是非常有趣、富有亲近感,他们被浓厚的生活气息所感动,兴致勃勃投入到新课的学习之中。
二、让学生亲身体验知识的形成和发展的过程。
小学生已经具有了一定的生活经验,因此教师设计了这样的情节:怎样知道星期日最喜欢做什么各有多少人呢?很自然的说出了要调查统计,那么怎样调查和统计呢?接着让统计员进行统计。教学过程环环相扣,整个统计的经历在师生互动、生生互动中清晰、充分地展现出来。课堂气氛活跃,双基训练扎实。
三、借助生活知识,让学生主动探究解决问题的方法,使学生感到数学的归宿是应用,使数学问题生活化。
教师在设计教学内容时,把握数学问题的加工度,努力改造数学问题,增加数学的情境性、开放性,注重呈现方式的多样化。为了巩固刚学会的统计方法,教者让学生去统计听课老师最喜欢干什么这一实践活动,首先让学生讨论教师人很多,怎样去统计这一问题,组织学生交流想办法,得出了一小组统计一排老师比较节省时间的方法,然后让学生按照想出的办法去统计。办法是学生自己想出来的,统计的过程是学生亲身经历的,学生人人参与,争论不断,效果明显。
四、引导学生分析讨论,提高了学生解决实际问题的能力。
在统计一分钟内车辆通过情况时,教师又一次让大家合作交流,学生讨论的结果是一小组有4人,1人负责记录数据,另3人每人统计一种车辆的简便方法。当学生把统计好的数据整理成统计表时,让学生分析讨论从统计的数据中你发现什么?想到什么?,这样的设计颇具挑战性和现实意义,挖掘出了许多促使人发展的因素,出现了现在人们生活水平提高了,买摩托车、汽车的人很多、汽车多了,要注意安全,要注意保护环境等思想教育的话题,变关注知识为关注学生情感态度、思维等方面的进步和发展,使知识性目标和发展性目标得到了平衡与和谐的整合。
纵观整节课,教者注意把数学与生活沟通,使数学教学贴近生活,使学生在知识的获得中得到发展,在发展过程中习得知识,使课堂充满生活气息,生命的活力。
大班科学简单统计教案 大班数学分类统计教案篇六
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大班科学简单统计教案 大班数学分类统计教案篇七
1、尝试运用不同的方法统计物品,提高计数能力。
2、感受统计给生活带来的帮助。
3、体验同伴合作完成任务的乐趣。
4、培养幼儿比较和判断的能力。
5、发展幼儿逻辑思维能力。
1、记录纸4张、记录板8块、计数条4套、记号笔8支。
个橱子内摆放4种物品:文具、食品、水果、玩具。
1、创设情境,幼儿初次合作,分享统计结果。
(1)交代任务,分组记录。
"今天,请你们来统计每个货架上有哪些商品,每种商品有多少。"幼儿分组统计商品并记录,教师指导。
(2)交流分享统计结果。
"每组请一个小朋友来介绍,货架上有哪些商品,每种商品有多少。你们是用什么办法记下来的?你们用了数字、图画、表格的办法进行了统计,知道了货架上有哪些商品,每种有多少。可是不能很快看出哪种商品最多,哪种商品最少。
2、尝试用计数条进行二次统计,分享新的统计经验。
(1)介绍材料,提出要求。
"请你们用记录板和计数条再来做一次统计,看能不能很清楚地看出哪种东西最多?哪种东西最少?"
(2)指导幼儿使用计数条再次统计。
(3)分享新的统计经验。
"货架上有几种商品?哪种最多?哪种最少?你是怎么看出来的?"小结:用计数条统计,能够很快地知道货架上有几种商品,哪种最多,哪种最少。还会知道最高的计数条代表的商品是最多的,最矮的计数条代表的商品是最少的。
(4)引导幼儿根据统计结果确定进货商品。
"一起说说看,需要进哪种货?"小结:你们用不同的统计方法让我知道了货架上有哪些商品、每种商品有多少,还能很快知道哪种商品最多,哪种最少。
3、观看课件,激发兴趣,拓展生活经验。
"在我们生活当中,很多时候还会用到统计,能帮助我们解决更多更复杂的问题。一起来看一看,还有什么时候会用到统计。"分别观看幼儿身高、营养搭配、全年平均气温、奥运会奖牌榜统计图表,再次感受统计在生活中的作用,激发幼儿对统计的兴趣。
数学活动对于小朋友来说是个很愉快的课程,因为整节活动中游戏的时间多,而且小朋友动手操作的机会比较多,但是要让孩子们能真正的理解这节教学活动的内容,并做到熟练掌握、灵活运用却不是那么容易。
大班科学简单统计教案 大班数学分类统计教案篇八
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大班科学简单统计教案 大班数学分类统计教案篇九
p89~90
1、让学生进一步学会从统计图表中获取信息,培养学生收集信息的能力。
2、使学生学会根据统计图表中的数据,回答简单的问题,并作出简单的预测。
3、发展学生提出问题和解决问题的能力。
电脑课件
(一)谈话引入
今天这节课我们将以讨论的方式继续深入认识统计图表。
(二)探索新知
课件显示如下统计表和讨论4个小问题
(1)身高和年龄有什么关系?
(2)什么年龄长得最快?什么年龄长得最慢?
(3)预测到8岁时,小军可能有多高?
(4)你还能提出哪些数学问题?
1、读懂统计表
2、小组内讨论,交流以上(1)、(2)、(3)、(4)四个小问题。
3、全班交流
(1)小军的身高随年龄增长而增高
(2)通过计算,知道:1~2岁高12cm、2~3岁高8cm......1~2岁长得最快,6~7岁长得最慢
(3)预计8岁时高5cm,有117+8=122cm
(三)、巩固练习
书p89“练一练”练习题
1、指导学生读懂统计图
2、讨论以下三个问题:
(1)哪天卖得多,哪天卖得少?
(2)一周内大约卖了多少台?
(3)预测接下来的周六、周日、周一可能卖多少台?
3、全班交流
(四)、统计实践活动
1、制成统计表
2、制成统计图
3、展示学生填写的统计图表
4、讨论、交流
5、质疑、解惑
(五)、全课
实验是进行科学研究的很重要的途径,科学家的许多发明、创造是从无数次的科学实验中获得的,所以我们从小要学会做一些简单的科学实验。
1、按实验要求认真进行实验的全过程,如定时观察、定时记录有关数据等。
2、要持之以恒,遇到困难不要泄气,能虚心请教他人。
3、能灵活统计表示实验中的相关数据
(六)作业
选用随堂练习作业
大班科学简单统计教案 大班数学分类统计教案篇十
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大班科学简单统计教案 大班数学分类统计教案篇十一
统计是数学的一个重要的思想方法,它通过对数据的收集、整理、描述和分析以及对事件发生可能性的刻画,来帮助人们做出合理的推断和预测。进而形成尊重事实、用数据说话的科学态度。《数学课程标准》非常重视“统计与概率”,并且指出在教学“统计”要从传统上比较注重统计图表有关知识点的教学转向重视学生对数据统计过程的体验,学会一些简单的收集、整理和描述数据的方法,认识统计的作用和意义。根据一年级学生的年龄特点,我确定本课(人教版一年级下册第94页例2)的教学目标如下,
1.使学生在自己喜欢的情境中学习数据整理,激发学习兴趣,感知数学在生活中的作用。
2.使学生感受、经历数据的整理过程,初步认识统计图和统计表,能正确填写统计图和统计表,能从中获得简单统计的结果。
3.使学生能使用各种统计的方法以及“正“字的统计方法统计数据。
4.初步培养学生的有序观察与思考的习惯和数学应用的意识,体验与同伴合作的欢乐。
使学生初步学会收集和整理数据,初步认识统计图和简单的统计表。
“正“字的统计方法。
方案一为:按照课本例2提供的情境进行。统计喜欢哪种颜色的花的人数。导入过程:六一儿童节到了,小朋友们正在用鲜花来装扮他们的教室,这里有哪几种颜色的花?你喜欢哪种颜色?然后对喜欢各种颜色的花的人数进行统计。(评析:学生学习比较被动,不知道为什么要对喜欢哪种颜色的花进行统计,学生兴趣并不高。)
方案二为:统计喜欢哪种活动的人数。教学片断如下
师:六一儿童节就要到了,我们班要搞一个活动。这里有四项活动,它们分别是“强凳子、拍皮球、夹弹子、考考你”(这是我了解到的孩子喜欢的一些活动,为了激起孩子的兴趣,我选了一些他们普遍喜欢的活动让他们选择。我把这些活动写在黑板上),这些活动你喜欢吗?
学生一下子来劲了,齐刷刷的说:喜欢
师:你最喜欢哪个活动呢?
我环视了一下四周,孩子们都迫不及待的要说出口。
我停了停又说:请把你最喜欢的一个活动写在老师发的纸条上,注意只能写上你最喜欢的一个。孩子们很快写好了,然后由组长收起来。(评析:给孩子神秘感,使得孩子更期待下面的学习活动,由“要他学”一下子转变成“他要学”了。)
师:现在老师想利用手里的这些纸条来知道,选哪个活动的人最多,那么这个活动将作为我们班六一儿童节时的一个活动。我该怎么办呢,请你帮老师想想办法吧!
怕几个孩子没能听清楚,我又说了一次:我怎么利用这些纸条知道,选哪个活动的人最多?
孩子们开始动起了脑筋,他们也遇到了问题。过了一会,一个孩子举起了手。
生1:你可以看一看纸条,看看哪个选的人最多就可以了。
师:是一张张看过来吗?
生1:嗯
师:唉!这个小朋友的方法好吗?
生2:我觉得不太好,这么多纸条怎么看得清楚,可能看了就忘了。
师:你说得很有道理,老师也是这么想的。那么有没有更好的方法了。
生3:我们可以做一下记录。
师:怎么记录?
生3:用打钩的方法。看一看选的是那个活动就在哪个活动下打钩。
师:你这个方法真不错。其他小朋友呢,你们用什么方法来记录呢?请小朋友们四人小组讨论一下可以怎样记录。学生开始讨论。(采用小组合作讨论的方法,使学生在积极主动学习的课堂中享受到自己学会知识的愉悦)
师:请各小组派代表说一说,你们准备用什么方法记录。
方法有:打圆,打三角形,打五角星,划横的,写正字。
讨论好了,我叫孩子们在准备好的草稿纸上跟着我把这几个活动写上。我在黑板上写了一组。然后叫了三个分别是用打钩,划横,写正字的学生上黑板统计,其他学生在自己的草稿本上统计。老师将纸条上的活动念一遍,学生用自己喜欢的方法记录、整理数据。
师:记录方法和符号没有统一要求,同学们喜欢用什么符号就用什么符号,那谁能用更直观、更形象的方法来表示呢?
学生小组活动:每组拿出一张空白虚线框图,进行制作统计图。小组汇报并展示统计图(评析:通过学生实践经验来学习知识,更体现数学源于生活从而引发学生更强烈的求知欲望)
方案二的课堂气氛明显好于方案一。方案一中,孩子们的反应显得非常被动,纯粹是为了学数学知识而在上课,孩子们显得难以接受。而方案二,学生就显得非常活跃主动了。方案一的导入,为什么学生的学习积极性没有呢?追其原因主要是:首先,孩子们不明白,为什么要统计这些喜欢不同颜色的花的人数,教材提供的情境不够贴近实际,没有展示出为我什么要进行统计,统计了是干什么,纯粹像是为了要学习统计这一内容而设计的一个情境。再次:虽然课本的例题提供了具体的情景,但孩子们兴趣不大,因此不能吸引学生的眼球。其次:在选择最喜欢哪种颜色的花时,可选性不大。因为这些花看起来都差不多,因此孩子们不知道到底选哪个好,选的时候也只是随便定了一个。而方案二就不同了:首先,这些活动孩子们都非常喜欢,看到六一节要搞这些活兴趣一下子来了,都迫不及待的想要告诉大家。其次:孩子们清楚统计的原因,要选出六一节的活动就要选择喜欢的人最多的那个,所以要进行人数统计。并且可选性要比例题的大。
大班科学简单统计教案 大班数学分类统计教案篇十二
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大班科学简单统计教案 大班数学分类统计教案篇十三
教材p120_121例3
通过练习,使学生明确植树问题的另一种情况-关于一个封闭图形的植树问题。
一、摆一摆
1、用棋子做学具摆一摆:1)每边放3个,四个角都放,围成一个正方形,一共要放几个棋子2)每边放4个,5个、6个各要多少枚棋子?
2、将摆放每边的棋子数与总数记录下来,看看有什么规律?
二、新授:
1、出示例题及围棋教具,
围棋的最外层每边能放19个棋子,想一想最外层一共可以摆放多少棋子?
你能想出几种方法
2、交流方法
3、小结,你还能发现什么规律,他与植树问题又有什么联系?围棋子与间隔数相等,是在封闭线上的植树问题。
三、巩固练习
1、做一做:
1)48名学生在操场上做游戏。大家围成一个大正方形,每边人数相等。四个定点都有人,每边各有几名学生?
2)要在五边形的水池边上摆上花盆,使每一边都有4盆花,可以怎样摆?最少需要摆多少盆?
3)为迎接六一儿童节,学校举行团体操表演。四年级学生排成下面的方阵,最外层每边站了15个人,最外层一共有多少名学生?整个方阵一共有多少名学生?
2、变式练习:练习二十6、7两题。
四、课堂总结
大班科学简单统计教案 大班数学分类统计教案篇十四
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大班科学简单统计教案 大班数学分类统计教案篇十五
统计(练习课)
【】
1、使学生进一步认识条形统计图,巩固所学的统计知识和根据图表中的信息,解决简单的问题。
2、使学生学会根据简单的问题,使用适当的方法收集数据,并将数据记录在统计表中。
【】
体验怎么收集信息。
【】
一、引入
师:小朋友们,我们这学期打算搞一次秋游,喜欢吗?昨天收到了气象台的一张11月份的天气预测表,我们一起来看一看吧!
二、展开
1、出示第97页第2个练习题的统计表。
师:从这张预测统计表中,你知道了哪些数学信息?
(统计的方法:“正”字法;每种天气的天数,强化“正”字法的数法。)
2、出示第97页第2题的条形统计图。
⑴师:我们还可以把统计表中的信息,画进统计图,从这张统计图,你看懂了什么?(引导学生自觉地复习相关统计图的知识点。横的代表天气,竖的代表天数,每一格代表2个单位等)新课标 第一网
⑵师:想一想,填写统计图要注意什么?再自己完成统计图,根据统计图你能提什么问题?会回答书上的问题吗?(学生独立完成统计图。)
⑶学生反馈,全班交流。
3、出示98页第5题的统计表。
师:我们和旅游公司取得了联系,旅游公司向我们免费提供早餐,现在他们向我们调查,早饭吃什么。你会用什么方法进行调查?(比较各种方法,选出比较符合实际情况的方法进行统计。)
⑴全班选用举手法进行统计。
⑵你能画出统计图吗?你发现了什么?怎么解决?(统计中会出现人数是单数的情况,引导学生如何在以一当二的格子中画。)
4、出示98页第4题。
⑴师:为表扬同学的出色表现,老师要买玩具送给大家。(出示第4题)这题在小组中完成。每个人只能选一样,组内先讨论怎么统计,再开始统计小组内的情况。
⑵小组活动后并交流。
三、习题
⑴独立完成97页第1题,思考:完成图表之前,需要知道什么,你从哪里了解这些信息?
⑵请一学生当小老师,讲解题目,师辅助。
四、总结提升
大班科学简单统计教案 大班数学分类统计教案篇十六
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大班科学简单统计教案 大班数学分类统计教案篇十七
人教版小学数学教材六年级下册第98~99页例2及相关练习。
1.了解三种统计图的不同特点,使学生知道对于同样的数据可以有多种分析方法,能根据需要选择合适的统计图,直观、有效地描述数据,培养进一步发展数据分析观念。
2.通过对三种统计图的认识、制作和选择,进一步培养学生对数据处理的能力及统计观念,使学生深刻体会到数学和我们的社会、生活密切联系。
了解不同统计图的特点;能根据实际问题选择合适的统计图,培养统计观念。
根据实际问题选择合适的统计图。
课件。
一、复习引入
1.复习扇形统计图。
上节课我们学习了扇形统计图,你对它了解了多少?
课件出示扇形统计图:我国居民平均月膳食各类食物的摄入量占总摄入量的百分比就可以用扇形统计图来表示。它能清楚地反映出各部分与总数之间的关系。
2.你还学过了哪些统计图?它们各有什么特点?
根据学生回答,课件随机点击出现相关内容。
(1)条形统计图,能清楚地看出各个数量的多少。
(2)折线统计图,不仅可以反映数量的多少,还能反映出数量增减变化趋势。
通过刚才的复习,我们发现,生活中有时用扇形统计图,有时用条形统计图,还有用到折线统计图的情况。那么人们在选择统计图时,是以什么为依据的呢?这三种统计图各有什么特点和用途呢?这就是我们本节课要研究的问题。
3.揭题:选择合适的统计图。(板书)
【设计意图】通过对三类统计图特点的复习,唤醒学生对已有知识基础的回忆,为接下来统计图的选择做好准备。
二、探究新知
1.学习教材第98页例2第(1)组数据。
课件出示
(1)绿荫小学20xx-20xx年校园内树木总量变化情况统计表。
仔细观察,你得到了哪些数学信息?如果让你用统计图表示这一组数据,你觉得可以用哪一种统计图?
学生:可以用折线统计图。
教师引导学生观察:统计图的横轴表示什么?竖轴表示什么?怎样确定竖轴上的数据每一格表示多少?(课件演示绘制过程)
教师:还可以用其他统计图吗?
学生:还可以用条形统计图来表示。(如果学生没有说到条形统计图,教师课件展示。)
教师:我们来看一看,条形统计图能不能把统计表中的信息完整地表示出来呢?
学生:可以把每年的树木总量表示出来;还可以通过条形的起伏看出大致的变化趋势。
引导比较:这张统计表中的信息可以用条形统计图来表示,也可以用折线统计图来表示,你觉得用哪一种更合适,为什么?可以同桌讨论。
小结:折线统计图能更加直观地表示出数量随着时间的变化趋势。相对来说,这里用折线统计图更合适一些。
【设计意图】通过对第(1)组数据的分析,让学生明确如何根据统计表所提供的数据特点来制作统计图,不局限于选择某一种统计图,以拓宽学生的思路,最后通过观察比较,选择更为合适的统计图种类。
2.学习教材第98页例2第(2)(3)组数据。
我们还对绿荫小学的树木进行了其他方面的统计,请看下方表格(课件出示统计表)。
请仔细阅读统计表信息,它们可以用什么统计图来表示?试着在练习纸上画一画。
比一比:你认为哪种统计图能更加直观地表达统计表中的信息?
交流反馈
第(2)张表格:可以用条形统计图来表示,也可以用扇形统计图来表示(课件演示)。
比较:都能表示出各种树木占树木总量的百分比,但扇形统计图能更加直观地反映出各种树木的数量和树木总量之间的关系。是的,当需要了解部分与整体之间的关系时,选择扇形统计图更合适。
第(3)张表格:给出了各种树木的数量,只能用条形统计图来表示。
为什么不用其他的统计图?
各种树种处于平等、独立的地位,用折线统计图表示是不合适的。
因为缺乏相应的百分比数据,所以也无法用扇形统计图表示。
3.课堂小结:通过刚才的学习,你知道了什么?
小结内容可以包括:三种统计图各有什么特点?在描述各种数据的时候可以用哪些统计图?其中哪些更有优势?用哪些统计统计图又是不合理的?
【设计意图】例题反映了根据不同的情况选择不同的统计图。第(2)张表格可以用不同的统计图,第(3)表格只能用一种统计图,选择什么样的统计图能更适当、清晰反映数据,通过让学生在自主分析数据以及制作、选择、比较统计图的过程中,进一步加深对三种统计图的特点的理解。
三三、巩固练习
1.教材第99页“做一做”。
课件出示题目:在林业科学里,通常根据乔木生长期的长短将乔木分成不同的类型。下面是我国乔木林各龄组的面积构成情况。
以上信息可以用什么统计图描述?哪种更直观?
(1)学生独立思考完成。
(2)交流反馈,根据学生回答出示统计图(可以用条形统计图完成,也可以用扇形统计图来完成)。
引导比较:用扇形统计图能更加直观地反映出它们之间的关系。
2.考考你:选择最合适的统计图。
(1)如果我想制作一个统计图,使它能够清晰地反映世界人口从1957—20xx年的变化情况,你认为选择哪种统计图最合适?
(2)如果我想制作一个统计图,使它能够反映20xx年各大洲人口占世界人口的百分比,你认为选择哪种统计图最合适?
(3)如果我想制作一个统计图,使它能够反映20xx年各大洲人口的具体情况,你认为应该选择哪种统计图?
3.教材第103页第7题。
(1)学生独立完成。
(2)集体交流订正。
大班科学简单统计教案 大班数学分类统计教案篇十八
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大班科学简单统计教案 大班数学分类统计教案篇十九
“扇形统计图”是义务教育课程标准实验教科书浙江教育出版社七年级上册第六章第四节的学习内容,是从生活中实际问题出发,结合新课程标准的理念,创造使用教材设计的一节课。生活中经常需要收集数据,而统计图是展示数据的重要方法,经常出现在报刊杂志媒体中,为此教科书安排了扇形统计图的认识和制作。
学生在小学里曾经学习过扇形统计图,对扇形统计图的意义、特点和制作有初步的了解。本节课数据的收集是从学生身边熟悉的简单问题入手,让学生体会数据在现实生活中的作用,理解扇形统计图的特点,并能从中获得有用的信息,进而养成数据说话的习惯,初一学生积极要求上进喜欢表现自己,课堂上应该给学生广阔的舞台,让学生充分思考、合作交流和探究,品尝学习带来的快乐。
知识与技能目标:
1、通过实际问题认识扇形统计图的含义和特点;
2、能从扇形统计图中获取正确的信息,并能作出合理的解释和推断。
过程与方法目标:
1、在收集数据的过程中,学会合作学习,并了解收集数据的方法步骤;
2、在从扇形统计图中获取信息的过程中,学会相互交流、相互评价;
3、在决策和形成猜想中的过程中,感受收集和利用数据是非常重要的。
1、通过从身边的一些简单问题,体验数据在解决不少现实问题中是有用的;
2、在问题解决的过程中,品尝发现带来的欢乐,树立学好数学的自信心。
重点:在合作讨论的过程中体会数据在现实生活中的作用,理解扇形统计图的特点,学会制作扇形统计图。
难点:从扇形统计图中尽可能多并且正确地获取信息、利用数据进行分析、作出判断。
大班科学简单统计教案 大班数学分类统计教案篇二十
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大班科学简单统计教案 大班数学分类统计教案篇二十一
1、体会用扇性统计图表示各部分数量同总数量之间的关系既清楚又形象。
2、让学生经历制作扇形统计图的过程,自主探索出制定扇形统计图的一般方法。
教学重点:探索并理解扇形统计图的含义。
教学难点:理解并掌握扇形统计图的绘制。
教学准备:扇形统计图的图片。
课时分配:共3课时。第1课时。
1、以前我们学习过条形统计图,大家还记得如何绘制条形统计图,以及条形统计图表达的含义吗?
2、出示一幅扇形统计图(教材第66页的放大图)。说明这也是一种统计图。叫扇形统计图。
1、出示例1中扇形统计图,说明:这是一幅彩电市场各品牌占有率的统计图。你能从中得到什么信息?
仔细观察扇形统计图,小组讨论,汇报:
(1)可以看出a牌的时常占有率是20%,b牌的市场占有率是15%,c牌的市场占有率是10%,d牌的市场占有率是8%。
(2)a牌的市场占有率比b牌、c牌的市场率大。
2、其他代表什么意思呢?
3、a牌彩电是不是最畅销的品牌?为什么?
说明:上面这幅统计图提供的数据不全,无法全面地反映有关彩电市场各品牌占有率的情况。
3、请学生用量角器在教材66页的扇形图中量每个扇形的圆心角各是多少度。
提问:每个圆心角的度数占整个圆周角度数的多少?你能发现什么问题?
积极动手,测量扇形的角度,汇报所量得的度数。
每个扇形的面积占整个圆面积的百分之几,这个扇形的圆心角的度数就占整个周角的百分之几。
1、扇形统计图是体现个体在整体中所占百分数的统计图。在扇形统计图中,用什么来表示整体呢?而它又是怎样体现这个百分数的呢?
2、引导学生总结扇形统计图的特点。
3、小组讨论,汇报:
(1) 扇形统计图都是用整个圆表示总数,也就是100%。
(2) 扇形统计图用圆内各个扇形表示各部分数量占总数的百分之几。
(3) 用扇形统计图可以清楚的表示出各部分数量占总体之间的关系。
(4) 从扇形统计图上可以直观地看出各部分数量的大小关系。
4、出示例题:六一班共有40人,有人对本班同学最喜欢的'体育项目进行了调查,发现有5人喜欢篮球,8人喜欢足球,10人喜欢羽毛球,15人喜欢乒乓球,2人喜欢排球。请将这个情况绘制扇形统计图。
放手让学生自学,巡视,参与并指导小组活动。
引导学生概括出绘制扇形统计图的一般步骤。
小组讨论,合作学习,结合扇形统计图的特点提出方案。
5、同学们回想一下条形统计图的有关知识,与扇形统计图相比较,他们各有什么优、缺点?
(1) 条形统计图可以直接看出各部分的数量,但不能看出各部分占总体的百分比。
(2) 扇形统计图可以直接看出各部分占总体的百分比,但不能看出各部分的数量。
1、请同学们对教材第67页第1题,看看自己刚才画的统计图是不是跟书上一样。
2、让学生完成第一题的两个题:你能判断出喜欢哪种文艺节目的人数量多吗?你有什么修改建议。
提出修改建议:可以加强调查的深度,对学生喜欢的文艺节目的类型再分细一些。
3、提问:如果喜欢歌曲的人数所占比例为30%,喜欢其他文艺节目的人数为25%,可以判断出喜欢哪种文艺节目的认输最多吗?
喜欢歌曲的人数最多。为什么?
这节课你有什么收获?
(指名学生口述画扇形统计图的一般步骤。)
板书设计: 扇形统计图
条形统计图可以直接看出各部分的数量,但不能看出各部分占总体的百分比。
扇形统计图可以直接看出各部分占总体的百分比,但不能看出各部分的数量。
课后反思:
大班科学简单统计教案 大班数学分类统计教案篇二十二
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大班科学简单统计教案 大班数学分类统计教案篇二十三
义务教育课程标准实验教科书第一册 p68-69
教材安排了三次统计活动,让学生学习用分一分、排一排、数一数的方法收集和整理数据,并初步认识简单的象形统计图和统计表。例题通过学生感兴趣的动物生日聚会的情境提出问题,体现生活里需要统计,激发学生的求知欲;接着通过分类理一理,出现象形统计图,使学生认识它,并依据它描述分类整理的结果;然后学生自己动手,分类整理花的朵数,并引入简单的统计表,让学生用数据表示分类整理的结果。"想想做做"让学生调查本小组的小朋友各爱吃哪一种水果,统计爱吃每种水果的人数,填入统计表。这样安排,意在让学生自己主动参与,并通过亲自实践,经历和体会整理简单数据的过程,初步认识统计的思想和方法。
1、通过自己喜爱的情境学习数据整理,对身边与数学有关的事物有好奇心,感知数学在生活中的应用。
2、经历数据整理的过程,
学习分一分、排一排、数一数的方法收集和整理数据,初步认识象形统计图和统计表,能从中获得简单统计的结果。
3、能进行有序观察和有条理地思考,体验与同伴的合作
1、通过实例感受统计的必要性。
2、通过实例,认识统计表和象形统计图(1格代表1个单位)。
3、在具体的统计活动中感受数据收集、整理、描述、分析的过程。
4、根据统计图表中的数据提出并回答简单的题。
统计教案
标签:一年级数学教案,小学数学教案,小学数学教案设计,统计教案,
1、学生能根据简单的问题,使用适当的方法 (如计数、测量、实验等)收集数据,并将数据记录在统计图表中。
2、组织有效的统计活动,使学生在活动中学会倾听、学会合作。
动物图象、统计表
一、借助故事,创设问题情境
师:同学们,你们喜欢过生日吗?今天,老师带你们去参加大象的生日宴会,你们愿意吗? (显示大象图像,并伴音:小朋友好。今天是我的生日,我特别高兴,妈妈告诉我,待会儿会有很多客人来为我庆祝生日。看,它们来了!显示:小动物们戴着面具唱着生日歌依次出现。)
师:你想知道什么?(学生可能会答:我想知道它们是谁?我想知道每一种动物有几只?)
二、实践操作,初步体验统计
师:是呀,大象家来了那么多客人,它们都是谁呢?分别有几只呢?下面,请同学们帮助大象对来的客人做好登记。一个客人就拿张相应的动物头像贴在吹塑纸上。(显示:动物客人依次揭开面具)学生摆动物头像。
统计教案由收集及整理,转载请说明出处
学生摆完后,师:大象家来了哪些客人呢?
生:大象家来了小狗、小猴、小猪。
师:他们分别有几只呢?
生:小猴有5只、小狗有4只,小猪有3只。
统计教案
标签:一年级数学教案,小学数学教案,小学数学教案设计,统计教案,
师:你是怎么知道的?
教师组织学生讨论:什么方法能一下子清楚地知道大象家来了哪些客人,分别有几只?学生分组讨论后汇报,引导学生想出分一分、排一排、数一数的分类统计的方法。
师: 分一分、排一排、数一数的方法好不好呢?我们一起来试试看,小组合作,先讨论怎么分,怎样排,然后动手理一理。
学生学习小组讨论、操作,然后教师把每一组的作品贴在黑板上展示。
师:同学们,你们觉得哪一组排得最整齐、最漂亮呢?(师为最漂亮的小组发一颗星。)
学生进行评价。引出课本第62页例图,请小朋友把每种动物的只数填在横线下面的括号里。(学生在书上完成。)
师:看了这幅图,你知道了什么?同学们有这么多发现,都是通过我们自己动手分一分、排一排、数一数得到的。刚才我们做的这些就是统计。
三、巩固深化,应用拓展
1、分小组整理各种鲜花的朵数。
师讲述:客人们给大象送来了什么?(花)有没有关于花的问题想问别的小朋友呢?(花有哪些颜色?各有几朵?)
师:课本巳经把这些花印在了附页上,请大家把附页里的花剪下来,分类贴在课本(课前剪好。)
分组讨论:从图中知道了什么?把每种花的朵数填在表格里。
组织全班交流,启发学生提出并回答一些简单的问题,如哪种花最多?哪种最少?你还知道些什么等)给予评价。
统计教案
标签:一年级数学教案,小学数学教案,小学数学教案设计,统计教案,
2、引导学生完成"想想做做"。
a、以小组为单位,说明题目的要求,让学生自己动手剪--剪、摆一摆。
b、组织学生交流各小组统计的结果,让学生提出并回答一些简单的问题。(喜欢吃哪种水果的人最多?吃哪种水果的人最少?你还知道什么?)
c、想一想,说一说。
师:今天我们帮大象统计了来的客人,送的鲜花,大象非常高兴。同学们,你们再帮大象想一想,怎样给客人们准备午餐呢?
让学生说出各自的想法,给予评价。
师:回家后把今天大象过生日的故事,讲给爸爸妈妈听一听
大班科学简单统计教案 大班数学分类统计教案篇二十四
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大班科学简单统计教案 大班数学分类统计教案篇二十六
人教课标版数学四年级上册教材第105页例2和106页做一做。
1、让学生在认识纵向复式条形统计图的基础上,认识并学习绘制横向复式条形统计图。
2、能根据统计图提出并回答简单的问题,能发现信息并进行简单的数据分析。
3、通过对现实生活中有关事例的统计、分析,激发学生的学习兴趣,培养学生的合作意识和实践能力。
1、采用讨论交流的形式,引导学生绘制统计图并发现数据中体现的问题。
2、结合统计图,引导学生收集、整理数据,并能进行简单的数据分析。
3、在练习中提高学生分析问题、发现问题的能力。
通过对现实生活中有关事例的统计、分析,激发学生的学习兴趣,培养学生细心观察的良好学习品质,教育学生热爱自然,保护环境。
会绘制横向复式条形统计图;对学生进行热爱自然,保护环境的教育。
根据统计图发现问题、提出问题、解决问题
探究发现教学法、情景教学法
多媒体、学习卡片
显示情境:同学们知道这是什么地方吗?(孙中山故居)对了,每年都有很多人来参观孙中山故居,为此,我们专门修建了停车场。
学习例2
1、谈话引入:同学们,如果你是停车场的管理员,就要对停车场的各种车辆数量进行统计,然后从统计的数据中收集有用的信息。如何才能更好地对这些数据进行分析呢?这就要用到复式条形统计图。下面就让我们一起来对收集到的信息进行整理和分析。
2、出示例2统计表
①提问:请大家说说从这张统计表中可以获得哪些信息?
教师:这是一张复式统计表,根据统计表我们可以知道有甲乙两个停车场,分别停有轿车28辆和24辆,面包车12和10辆,大客车6辆和7辆,货车4辆和3辆。
②教师引导:通过这个复式统计表,我们可以绘制出前面对比过的那种横向复式条形统计图。(出示待补充的统计图)
教师:你能把它补充完整吗?
③教师:在三年级时我们已经学过横向单式条形统计图的绘制,前一节课我们又学习了纵向复式条形统计图的绘制,请大家利用这两个旧知识尝试补充完成例2的横向复式条形统计图。
分发学具——出示统计表。
学生根据统计表独立补充完整横向复式条形统计图。
④教师:老师也根据统计表制作了一张统计图,大家来看一下。
出示补充完整的统计图。
教师:请同学们对比观察自己绘制的和老师绘制的统计图,说一说我们在绘制统计图的时候要注意些什么?
师归纳并板书:
条形粗细要均匀;甲、乙两个停车场辆数的图案要不同;写好数量;写出统计图的标题。
⑤根据绘制统计图需注意的问题,小组间展示交流,互相评价绘制的横向复式统计图。
教师:下面请同学们在小组间将各自绘制的统计图进行展示交流,共同评价小组内绘制的每张统计图,并对小组内的每张统计图进行评等。评等分a、b、c、d四个等级。
⑥请几位学生在全班展示交流自己绘制的横向复式统计图,同时师生加以评价。
3、小组讨论,合作交流:根据这张统计图,你能提出什么数学问题?你还能发现哪些信息?
4、请几位学生在班内汇报、交流。
师归纳:通过甲乙两个停车场的比较分析,我们可以发现两个停车场有一个共同的特点就是轿车停放的数量较多,由此可以初步断定其他停车场中轿车的数量也是最多,或者在整个社会所有车辆中轿车的数量也是最多的。
指导完成106页的“做一做”
1、让学生独立完成这张横向复式条形统计图。
2、1985年甲、乙二个地区降水量各是多少?20xx年呢?
3、根据这张统计图,你发现了什么信息?有没有什么建议?
根据学生的回答,相机出示:绿化多——树林多——降水多——树林茂盛……形成良性循环
师归纳:根据图中信息发现绿化搞得好,树木就多,树木越多就能带来更多得降水,树木就更茂盛,能够形成良性循环。为此,我们要积极进行绿化活动,努力把我们周围的环境绿化好,保护好。同时,我们要争做一名环保小卫士,大力宣传环保知识,积极参加环保活动,勇于制止破坏环境的行为。环境保护,人人有责。让我们携起手来共同建设我们美好的家园。
出示:保护环境 关爱家园 从我做起
让学生说一说这堂课有什么收获?还有什么问题?
练习二十的1、2题。
大班科学简单统计教案 大班数学分类统计教案篇二十七
1、使学生体验数据的收集、整理、描述和分析的过程,进一步体会统计在现实生活中的作用,理解数学与生活的密切联系。
2、让学生认识两种复式条形统计图,能根据统计图提出并回答简单的问题,能发现信息并进行简单的数据分析。
3、通过对现实生活中有关事例的调查,激发学生的学习兴趣,培养学生细心观察的良好学习习惯,培养学生的合作意识和实践能力。
(一)教材说明。
本册教材是在学生已有知识和经验的基础上,让学生进一步体验数据的收集、整理、描述和分析的过程,认识两种复式条形统计图。并继续注意结合实际问题,进一步教学根据统计图表进行简单的数据分析,作出合理的判断和决策。这样就把数据分析与解决问题结合在一起,使学生更好地理解统计在解决问题中的作用,逐步形成统计观念。
例如,简单的数据分析教学,例1通过对某地区不同时期的城乡人口分别进行统计,再引导学生把两个统计图合并,形成一种新的复式条形统计图;接着引导学生对上述统计结果进行分析,进而发现该地区近年来人口不断增长,随着经济的发展,乡村人口不断转为城镇人口,因而乡村人口不断减少,城镇人口不断增加。让学生经历“运用数据进行推断”的思考过程,体会统计对于事物发展趋势的判断作用。
(二)本单元的编排主要有以下几个特点。
1、让学生在已有知识和经验的基础上自主探索复式条形统计图的绘制方法。
2、提供丰富的联系实际的素材,让学生更进一步体会统计的功能。
3、加强例题和习题的开放性,培养学生发现信息、提出问题和解决问题的能力。
第一课时:
(一)情境导入:
你们知道全球有多少人?中国有多少人吗?那你们知道自己所在的区有多少人吗?
下面我们一起对收集到的信息进行整理和分析。
(二)探究新知:
1、根据统计表,分别完成两个单式条形统计图。
2、根据两个条形统计图你能发现哪些信息?如果要在一个统计图中描述这些信息怎么办?在学习复式统计表时是怎么把两个单式统计表合并的学生观察统计表,完成成两个单式条形统计图的绘制。学生思考老师的问题,自主探究完成复式条形统计图的绘制。
3、展示学生绘制的纵向复式条形统计图。
板书课题:纵向复式条形统计图。
4、讨论交流:
复式条形统计图与单式条形统计图有什么区别?
5、全班汇报交流。
(三)巩固新知。
1、完成102页的做一做。
2、完成练习十九的第1题和第2题。
(四)课堂小结。
这节课你有什么收获?
(五)作业:第103—104页3、4、5学生展示统计图。
(六)教后记:
第二课时:
(一)情境导入:
现在人们的生活水平提高了,许多家庭都买了汽车。哪些同学的家里买了汽车?我们在外出时有时就要将汽车放在停车场。下面我们一起对收集到的信息进行整理和分析。
(二)探究新知:
1、学习例2。
师:复式条形统计图还可以画成横式的。
(1)学生观察统计表。
(2)自主探究完成复式条形统计图的绘制。
(3)学生展示统计图。。
2、通过分析你能发现什么?
学生讨论交流。
(三)巩固新知。
1、完成106页做一做。
2、完成练习二十的第1题、第2题和第3题。
(四)课堂小结。
这节课你有什么收获?
(五)作业:第103—104页3、4、5学生先独立思考,再进行全班交流发现信息,提出和解决问题。
第三课时:
(一)情境导入:
1、出示贺卡,大家知道是什么吗?同学们在元旦的时候都收到过贺卡吗?你给谁寄过贺卡吗?
2、今天我们来上一节:你寄过贺卡吗?的实践课(板书课题)
(二)探究新知。
1、发现问题;
(1)呈现教材提供的阅读材料,学生阅读。
①平时寄贺卡的行为消耗掉了大量的木材。
②对废品要有效回收。
(2)昨天老师布置了小组调查:本小组成员及家庭在去年收到的贺卡数量。
学生制成统计表,填写统计表。
2、分析问题:
(1)出示问题:
①估算一下,全校所有的学生共收到多少张贺卡?所有的家庭收到的贺卡相当于砍掉多少课大树?
②引导思考:怎样根据小组的统计结果,估计全班、全年级和全校共收到多少张贺卡?
出示阅读资料:
①小组合作探索
②小组汇报,交流调查的结果。
③根据组里统计的结果计算出全班的结果,扩展到全年级和全校情况。
(3)引发学生对统计数据的思考,引出结论。
(4)问题:除了保护森林,少寄贺卡还有哪些好处?提出更多的问题,和同学一起讨论解决。
2、解决问题。
实施解决方案——行动起来吧!
你有什么好的建议,和同学交流一下。
(三)课堂小结。
(四)作业:
1、根据今天所学的内容写一篇数学日记,为保护森林,应该少寄贺卡。
2、节约日常开支,减少邮政压力等。
3、汇报交流:做环保贺卡,打电话发电子邮件问候,宣传节约用纸,计划自己平日节约用纸的方案等。
大班科学简单统计教案 大班数学分类统计教案篇二十八
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