复习是我们学习过程中一个非常重要的环节。通过复习,学生不仅能掌握每次所学的知识,还有利于与旧知识结合形成知识体系,加强对知识的理解、巩固与提高,也可弥补知识的缺陷,使基本技能和素养进一步熟练。科学学习也是如此,也需要复习,梳理概念之间的联系,帮助学生建立活的概念,从整体上把握每课学习的重点和探究过程。但作为科学教师,我们都有普遍的感受:一是学生学完科学后,经常就抛置脑后,只知道自己上节课玩了什么, Reviewing is a very important part of our learning process. Through the review, students can not only master each learned knowledge, but also conducive to combining with the old knowledge to form a knowledge system, strengthen the understanding of knowledge, consolidation and improvement, but also make up for the shortcomings of knowledge, so that the basic skills and literacy further proficiency. The same is true for science learning. It also requires reviewing, combing the links between concepts, helping students to establish a living concept, and grasping the focus and inquiry of each lesson as a whole. However, as a science teacher, we all have a common feeling: First, after students finish their studies, they often forget about what they did during the last lesson.