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1、青岛版小学数学六年级上册圆的周长教后反思圆的周长教后反思圆的周长教后反思在设计圆的周长这节课时,我的思路是让学生阅读学习目标产生疑惑,激发他们的求知欲,通过自学解决自己的疑惑。一、本节课成功之处:自主探索中培养学生的动手操作能力。动手实践,自主探索和合作交流是小学生学习数学的重要方式,而“猜想验证”又是学生探索中常用的方法。这节课在学生猜测圆的周长可能与圆的直径或半径有关的时候,让学生通过绳绕法测量出不同圆的周长和直径及比值来验证猜想。通过小组间的交流得到周长与直径比值的规律,再尝试写出公式。为了防止小组合作学习流于形式,避免学生在活动时没有目的性,根本不知道自己该干什么。在小组合作前,我明确
2、的提出了提出活动要求:小组合作,测量圆形纸片的周长和直径,把数据填在圆的周长记录单上,让组长分工。二、需改进的方面:导课环节略显沉闷,需增加一些乐趣在导课中,我通过复习正方形和长方形的周长知识的方法导入,缺少乐趣,我可以作如下修改:1.谈话:同学们,知道大家都喜欢看喜羊羊和灰太狼的动画片,今天,老师把它俩带到了我们的课堂。听:(课件播放故事:在一个天气晴朗的日子里,喜羊羊和灰太狼举行跑步比赛,喜羊羊沿正方形路线跑,灰太狼沿圆形路线跑,一圈过后,它们又同时回到了起点。此时,它俩正为谁走的路程长而争论不休。同学们,你们认为呢?)(学生进行猜测)2.要想确定它俩究竟谁跑的路程长,可怎么做?(生:先求
3、出正方形和圆形的周长,再进行比较。)3.指名一生说说正方形的周长计算方法:(生:边长4=周长)今天这节课,我们一起来研究圆的周长。(揭示课题:圆的周长)(设计意图:喜羊羊与灰太狼是当前孩子们最喜闻乐见的动画片。设计两者进行赛跑时生活问题,转化为比较圆的周长和正方形周长的数学问题。创设生动的教学情境,激发学生参与的兴趣,为后继学习和深入探究埋下了伏笔。利用动画的演示过程,很好地展示并便于学生理解圆周长的概念。)另外,教学语言不够精炼,小组间的互帮互助没有得到很好的体现,练习的设计上考虑的还是有些不到位,这也是我在今后教学中,应该注意的问题。结束语!祝大家学到有用的知识,提升自己的能力,实现自己的
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