数学教师都很重视复习课。复习课的效果,直接影响着学生对所学知识的进一步理解、掌握和运用。在复习课上,教师要通过多种方式指导学生复习,板书就是其中的一种重要形式。好的板书,能突出大纲、教材的重点和关键,理清知识的科学系统,使一些重要概念、定理、公式象书架上的图书一样,层层 Mathematics teachers attach great importance to review classes. The effect of the review class has a direct impact on students’ further understanding, mastery and application of what they have learned. In the review class, the teacher is required to guide the students in a variety of ways to review. The on-line book is one of the important forms. A good board can highlight the key points and key points of the outline and the teaching materials, clarify the scientific system of knowledge, and make some important concepts, theorems, and formulas the same as the books on the bookshelf.