长期以来数学教师在备课时已经把教材内容进行了提炼,在课堂上通过自己的语言表达给学生,而大部分学生是被动地接受和理解,学生没有进行课前预习,对数学概念的理解印象不深,时间一长容易忘记,这样也就缺乏阅读数学教材的能力和习惯。前苏 For a long time, math teachers have already refined the teaching materials during the lesson preparation and expressed it in their own language in the classroom. Most of the students are passively accepted and understood. The students do not have the pre-lesson preview and understand the mathematical concepts Not deep, easy to forget over time, this also lack the ability to read math textbooks and habits. Before the Soviet Union