单班数学课，特别是高年级，难上！单班数学课教师常说：好学生课堂上无事可干，差学生总是跟不上，不知照顾哪头才好。一般人都知道，一个班集体，学生个体间，各方面都存在很大差异，越到高年级表现得越明显。在单班数学教学中，怎样才能面向全体，两头一起抓，充分发挥课堂? Single class math class, especially the upper grades, difficult! Single class math class teacher often said: good students have nothing to do in the classroom, the poor students always keep up, I do not know which one is better care. Most people all know that there is a big difference in all aspects between a class and a group of students, and the more obvious it is in the higher grades. In a single class of mathematics teaching, how can we face the whole, both together grasp, give full play to the classroom?