一、问题的提出学生学习数学时经常出现如下现象:上课听懂了,但自己做题的时候就错;简单的题目会模仿,稍微复杂些的就不知如何入手了;部分学生学习数学的热情不高,数学成绩很糟糕,进而对数学很没信心甚至于畏惧.学生是否主动学习,学习方法是否科学,有无建构良好的知识体系等都是原因,但还有一个更重要的原因来源于教师.由于教师在对教材的整体把握上存在较大差异,而班级学生人数太多,有很多精力 First, the problem raised Students often appear the following phenomena in mathematics: class understand, but when they do the wrong question; a simple subject will be imitated, a little more complicated do not know how to start; some students learn math enthusiasm Not high, poor math results, and then no confidence in mathematics even fear.Students take the initiative to learn, learning science is, whether a well-constructed knowledge system and so are the reasons, but there is a more important reason comes from Teachers. Because teachers in the overall grasp of the textbook there is a big difference, while the number of class students is too much, there is a lot of energy