教学内容:人教版义务教育教科书数学六年级上册62—63页。教学目标:1.使学生理解圆周长的概念和圆周率的意义,理解并掌握圆周长的计算公式。2.使学生经历猜想、操作、探究等学习活动,体验转化、归纳的数学思想,提升数学思维的水平,感受数学文化的魅力。教学重点:圆周长计算公式的推导。教学难点:圆周率的探究。教学过程:一、情境导入师:(出示视频)同学们,看!这是乌龟和兔子,它们将要绕着这个圆形操场跑一圈,想比比看谁先到达终点? Teaching content: People’s Education Edition compulsory education textbooks sixth grade volumes 62-63 pages. Teaching Objectives: 1. To enable students to understand the concept of circular circumference and the meaning of the pi, understand and grasp the calculation formula of the circumference. 2. Make students go through learning activities such as conjecture, operation and inquiry, experience the mathematical ideas of transformation and induction, improve the level of mathematical thinking, and feel the charm of mathematical culture. Teaching Focus: Derivation of Circumference Length Calculation Formula. Teaching Difficulties: Exploration of Pi Rate. Teaching process: First, the situation into the division: (Show video) Students, look! This is a turtle and a rabbit, they will have to run around this circular playground, like to see who will reach the end first?