根据维果斯基的理论,教师在教学时,必须考虑学生的两种思维发展水平:一种是现有水平,一种是在他人协助下可以达到的较高水平,即最近发展区~([1])。学生思维的最近发展区,是笔者近几年备课中经常思索的问题。从宏观上设计一节习题课,通常都会考虑如何选题、如何把这些题目组合起来,以及如 According to Vygotsky’s theory, teachers must consider two levels of thinking development of students in teaching: one is the current level and the other is the higher level that can be achieved with the assistance of others, namely, [1]). The recent development of student thinking area, is the author in recent years, often thinking in lesson preparation. From the macroscopic design of an exercise class, usually consider how to choose the topic, how to put these topics together, and if