例题是教材的核心内容。概念的形成、规律的揭示、技能的训练、智能的培养,往往要通过例题教学来完成,例题教学是课堂教学的重要环节。如何充分发挥例题的教学功能,美国著名数学教育家波利亚在总结出的解题的四个步骤中,第四步就是“回顾”。笔者认为:所谓“回顾”,就是在讲解 Example is the core content of the textbook. The formation of the concept, the revelation of the law, the training of skills and the cultivation of intelligence are often accomplished through the teaching of examples. The teaching of examples is an important part of classroom teaching. How to give full play to the teaching function of the examples, the fourth step in the four steps that the famous American mathematics educator Polya summed up is “Review.” The author thinks: The so-called “review” is to explain