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【教学内容】苏教版小学数学五年级下册第92、93页。【教学目标】1.理解圆周率的意义,能根据实际情况,运用圆周率计算圆的周长。2.经历操作、探究、猜想等学习活动,提升思维水平,感受数学文化。【教学重、难点】探究和理解圆的周长与直径之间的关系。【课前思考】在备《圆的周长》这节课时,我有以下几点困惑:1.教材是用车轮引入圆的周长的概念的,那么车轮出现在课始,会不会让学生感觉到很突兀?如何
Teaching content】 【Sujiao primary school mathematics grade two volumes under the first 92,93 pages. 【Teaching Objectives】 1. To understand the significance of the pi, according to the actual situation, the use of pi calculated perimeter. 2. Experience, learning, conjecture and other learning activities to enhance the level of thinking, feel the mathematical culture. 【Teaching heavy, difficult】 to explore and understand the relationship between the circumference and diameter of the circle. [Pre-class thinking] In preparing the “circumference of the circle” this lesson, I have the following confusion: 1. Textbook is the introduction of the concept of the perimeter of the circle with the wheel, then the wheel appeared in the beginning, will not let Students feel awkward? How?