数学教育家波利亚曾说:“一个专心的认真备课的教师能够拿出一个有意义的但又不复杂的题目,去帮助学生挖掘问题的各个方面,使得通过这道题,就好像通过一道门户,把学生引入一个完整的理论领域.”在学习过程中回归课本是一个非常重要的环节,但回归课本不仅仅是看教材中的一些例题和习题,作为教师,需要对教材进行重新开发.教师首先要引导学生做熟做透教材中的典型例题和习题,要善于研究教材中题目的变式,善于在高考题中寻找 Poliya, a math educator, once said: “A dedicated lesson preparation teacher can come up with a meaningful but uncomplicated topic to help students tap into all aspects of the problem so that passing the question is as if passing A portal to bring students into a complete theoretical field. ”The return of textbooks is a very important part of the learning process, but returning to textbooks is not just a matter of reading examples and exercises in textbooks. As teachers, we need to re-teach textbooks Development. Teachers should first guide students to do the typical examples and exercises done in teaching materials, should be good at studying the topics in the textbook variants, good at looking for college entrance examination questions