“因式分解”一章,笔者曾教过多遍,在以前的教学中主要采取“讲题型、套步骤”、“增加练习数量”、“加大测验次数”等办法。其结果是师生不堪重负、效果不佳。自1989年8月起,我参加了扬州市“早期发展数学观念”课题组的教学实验,努力从发展数学观念的高度去统帅教材、组织教材,收到了较好的效果。 “Factorization” chapter, I have taught many times, in the previous teaching mainly to “type of topics, sets of steps”, “to increase the number of exercises”, “increase the number of tests” and other methods. The result is teachers and students overwhelmed with ineffectiveness. Since August 1989, I took part in the teaching experiment of Yangzhou's Task Force on Early Mathematic Development. I tried hard to command teaching materials and organize textbooks from the perspective of developing mathematical concepts and received good results.