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1 教材分析凸透镜成像规律是初中光学的一个重要内容。从教材的结构和内容安排可看出编者的意图:第一是让学生通过实验探索掌握凸透镜成像规律;第二是让学生通过实验操作,认识物理课是以实验为基础的这一学科特点。同时也是使用物理通报编九年义务教育三年制初级中学物理课本的学生的首次学生实验课。所以本节课的教学结构是以教师示范和规范学生操作行为为突出特点的学生实验课。对各项实验内容和有关知识,应分步进行示范讲解,使学生的实验操作始终处在清楚、明确的指导下进
1 Textbook Analysis Convex lens imaging is an important part of junior high school optics. The editor’s intention can be seen from the structure and content arrangement of the teaching materials: the first is to allow students to master the convex lens imaging law through experimental exploration; the second is to let students through the experimental operation, to recognize that the physics lesson is based on the experimental characteristics of this discipline. At the same time, it is also the first student’s experiment class for students who use the physical bulletin to prepare a nine-year compulsory education for a three-year junior high school physics textbook. Therefore, the teaching structure of this lesson is a student experiment class in which the teacher demonstrates and regulates student behavior as a prominent feature. For each experiment content and related knowledge, step-by-step demonstrations should be given so that the students’ experimental operations are always under clear and clear guidance.