新课标指出“每个学生都应该习得自己的数学,数学要面向全体学生,人人学有价值的数学.”传统的教学模式中,教学目标的设定、教师的讲解、作业的布置针对的是班里的中等生,这就形成了班级教学的普遍现象,即优等生在课堂上不能充分利用时间,陪读现象严重,差等生一片茫然,整节课紧张慌乱听不懂.学生能力水平的差异也给中学数学教师提出了新的课题. The new curriculum standard states: “Every student should learn his math, mathematics should be for all students and everyone should learn valuable mathematics.” In the traditional teaching mode, the teaching goal setting, the teacher’s explanation, the homework The arrangement is aimed at the students in the class, which formed a common phenomenon in class teaching, that is, excellent students in the classroom can not make full use of time, serious problems with reading, poor students born a loss, the whole class nervous panic do not understand The differences in the level of students’ abilities also put forward new topics for middle school mathematics teachers.