1问题的背影本人多年同时任教一个理科实验班,一个普通班.理科实验班学生的数学基础较好,思维能力较强,多数为数学尖子生(有各级数学竞赛获奖经历).普通班的学生多数为数学中等生.经过多年的观察与研究,我们发现,在数学解题活动中,中等生与尖子生和目标意识差异十分明显,对解题 1 Back view of the problem I have taught a science lab for many years at the same time, an ordinary class. Science class students have a good mathematical foundation and strong thinking skills. Most of them are top math students (having mathematics competitions at all levels). Regular classes Most of the students are middle-school mathematics students. After years of observation and research, we have found that among the mathematics problem-solving activities, the difference between middle school students and top students is very obvious, and the problem is solved