2022年北师大版七上4.7有趣的七巧板教案 .pdf
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1、名师精编优秀教案47 有趣的七巧板龙湖中学xjs 2006-12-8 一、教材分析1、教材的地位和作用北师大教材七年级上册第四章“平面图形及其位置关系”的一节活动课线段、射线、直线、角 平行、垂直 七巧板2、活动目标知识目标：通过七巧板的制作，拼摆等活动，进一步认识垂直、平行、角等有关内容，做到学以致用。能力目标：发展空间观念，丰富学生的想象力，加强学生的动手操作能力，培养学生自主学习能力和团体合作精神。情感目标：感受数学的美，激发学生民族自豪感和爱国热情。二、教学方法和手段：1、采用教师引导，学生自主探索和小组合作完成相结合的活动方式。2、利用小组的不同创作来活跃课堂气氛。三、教学准备：课前
2、用垫板制作一付较大的七巧板，七个压图磁铁。（尚无条件使用多媒体的）布置学生各自准备彩笔、剪刀、方格纸四、学法指导学生通过动手、动口、动脑等活动，主动探索，发现问题，小组之间互相合作，取长补短。养成自主学习和合作学习相结合的良好习惯。五、教学过程1创设问题情境国际数学奥林匹克竞赛会标名师精编优秀教案认识七巧板制作七巧板欣赏七巧板（1）认识七巧板提问：关于七巧板的相关知识，大家了解多少？你们都是通过哪些渠道？都有哪些相关的网站？课前学习课堂学习课后再学习七巧板起源于宋代，创始人是黄伯思，最早称作“燕几图”由一个正方形分割成五个三角形、一个平行四边形和一个正方形。利用这七块几何形状就可以拼成千变万化
3、的几何图形，形拟各种自然事物。七巧板不但流传于中国，而且也被西方国家所瞩目，被称为“东方魔板”。构成：它 是 用 一 个正 方 形分 割 成 五 个三 角 形、一 个平 行 四 边 形、和一个一个小正方形。你发现七巧板中最大板（三角形）是最小板（三角形）的几倍？平行四边形的面积是七巧板总面积的几分之几？找一找：有互相平行的线段吗？有互相垂直的线段吗？你能找出一个锐角、一个直角、一个钝角吗？并说出它们的度数。（2）制作七巧板分割正方形1、说出图中互相垂直、互相平行的线段。2、说出每块七巧板的具体特征。（角度、各边关系）3在制作的过程中还要注意应用哪些数学知识呢？活动一内容；制作七巧板形式：四人小
4、组材料：彩笔、剪刀、方格纸要求：分割前正方形的规格10cm*10cm 你会拼吗？P161/的四个图形文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4文档编码:CG4V3
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10、H2M6R1F9X4文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4文档编码:CG4V3T1U5B7 HI8G9C1Y7A7 ZH2M6R1F9X4名师精编优秀教案思考：（一位学生在黑板上演示）用七巧板的2 块部件能拼出正方形吗？3 块呢？4 块呢？拼一拼，与同伴交流，比一比谁的方法多。下面这个图案还没拼完，你能帮忙把它拼完吗？梯形1 2 7 4 6 1 7 6 4 三角形答案文档编码:CG4V3T1U5
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