本文以科粤版九年级下册第七章第二节“饱和溶液与不饱和溶液概念的形成与理解”第一课时为例,谈谈如何根据知识的内在逻辑和学生的认知规律来设计课堂活动,通过做好“观察活动”的实验,启发学生观察、记录、分析实验现象,理解饱和溶液、不饱和溶液的概念。通过“问题”层层递进,构成一个完整的概念形成过程。学生在参与的过程中体会探究的愉悦与科学的严谨。 This article is based on the first section of “the formation and understanding of the concept of saturated solution and unsaturated solution” To design classroom activities, through doing a good job of “observation activities” experiment, inspire students to observe, record, analyze the experimental phenomena, to understand the concept of saturated solution, unsaturated solution. Through the “problem ” progressively, constitute a complete concept of the formation process. Students in the process of participation to understand the joy of exploration and scientific rigor.