【教学内容】(人教版)数学六年级上册62-63页。【教材分析】这部分内容是在三年级上册学习了周长的一般概念以及长方形、正方形周长计算的基础上进一步学习圆周长的计算。教材从生活情境入手,通过让学生思考自行车绕圆形花坛骑一圈大约有多少米,引出圆的周长的概念。引导学生测量几组圆的直径和周长,观察发现周长和直径的比值是一个固定值,从而引出圆周率的概念,推导出圆的周长计算 【Teaching content】 (PEP) Math sixth grade volumes 62-63 pages. [Textbook analysis] This part is in the third grade to learn the general concept of the perimeter and the calculation of the circumference based on the calculation of the circumference of the rectangle and the circumference of the rectangle. Textbook from the life situation to start, by allowing students to think about riding a bike around a circular flower bed about how many meters, leads to the concept of a circular perimeter. Guide students to measure the diameter and circumference of several groups of circles, observed that the ratio of perimeter to diameter is a fixed value, leading to the concept of the pi, derived circle perimeter calculation