我们都知道,教材的编写应该能引起学生的思考或者通过学习让学生在学习过程中便于理解,便于操作.大多数时候,教材在这些方面做得都很好.但在一些细节方面有些地方却值得商榷.我教华东师大版数学教材已经很多年了,在教学中发现教材中有以下两个方面值得改进:1.在八年级上册教授全等三角形的内容时,课本首先利用一节课的时间讨论了两个三角形分别有一组,两组元素对应相等时两个三角形不一定全等.接着讨论了三个元素对应相等时共分几种情况.最后通 We all know that the preparation of teaching materials should arouse the students’ thinking or learning to make the students easy to understand and operate in the learning process. Most of the time, the textbooks do a good job in these aspects, but in some details, It is open to question.I teach East China Normal University version of mathematics textbooks for many years, teaching found in the following two aspects of teaching material is worth improvement: 1. In the eighth grade professor congruent triangle content, the textbook first use of a class Of the time to discuss the two triangles have a group, the two groups of elements corresponding to the same two triangles are not necessarily congruent. Then discussed the three elements correspond to the same time is divided into several cases.