前置清障,就是将最近发展区中阻碍学生发展的障碍点提取出来,独立于所要解决的问题之外,提至解题之前攻克之,从而为解决问题铺平道路。教师备课备学生,主要是了解学生现有水平,设计提升潜在发展水平的问题,准确定位学生的最近发展区,寻找最近发展区中阻碍发展的障碍点,提前定点清除。 Pre-emptive removal is to extract the obstacles that hinder the development of students in the recent development area. It is independent of the problem to be solved and should be overcome before the problem-solving so as to pave the way for solving the problem. Teachers prepare lessons for students, mainly to understand the existing level of students, designed to enhance the potential level of development problems, accurate positioning of the student’s recent development zone, to find the most recent development zone hinder the development of the obstacles point in advance clear.