美国著名数学教育家波利亚说过:“一个专心的认真备课的教师能够拿出一个有意义的但不复杂的题目,去帮助学生挖掘问题的各个方面,使得通过这道题,就好像通过一扇门,把学生引入一个完整的理论领域。”数学题是无限的、解不完的,教师只有找到有代表性的题目并作详细研究,提炼出技能与思想,才能让学生学有所得、学得不盲目不盲从。可以说,寻找好题并应用好题,是数学教师的一大任务。 Polly, a famous American mathematical educator, said: “A dedicated lesson preparation teacher can come up with a meaningful but uncomplicated topic to help students explore all aspects of the problem, making it as if Through a door, the students into a complete theoretical field. ”" Math questions are unlimited, indelible, the teacher only to find a representative topic and make a detailed study, refining skills and ideas in order to enable students to learn Income, learning is not blind obedience. It can be said that finding good questions and applying good questions is a major task of mathematics teachers.