层次化教学的实践○银川一中张文国前些年，在数学教学中，我和一些同行常常有这样的感受：尽管力气没少用，功夫没少下，但收效甚微，症结在哪里呢？经过分析和研究，我发现问题出在忽视研究学生，不能因材施教上。教师任两个班的课，一百多个学生，肯定会有这样或那样的... The Practice of Hierarchical Teaching ○ Yinchuan Yizhong Zhang Wenguo In previous years, in mathematics teaching, I and some of my peers often felt like this: Although there was no shortage of effort, there was no shortage of effort, but there was little success. What was the crux? After analysis and research, I found that the problem lies in ignoring student research and not teaching students in accordance with their aptitude. There are certainly two or more classes for teachers and more than one hundred students.