部编初中生物教材中的《光合作用》一节,是讲述绿色植物最重要的生理活动,是教材的重点。在讲述光合作用时,要涉及到一些物理、化学方面的知识,而初一学生缺乏这方面的基础知识,特别是有关能量的知识,对他们来说尤其难理解,如果我们教师不提出能量等概念,学生很难理解光合作用的本质。所以,本节又是教学的难点。我在教学过程中,除了认真做好课本上指定要做的演示实验外,还增做了《叶绿素的荧光》实验,目的是想从直观教学着手,帮助学生理解光合作用的概念和光合作用包含了两方面的变化:即物质转化过程和能量转化 Part junior high school biology textbook “photosynthesis” section is about the most important green plant physiological activities, is the focus of the textbook. When it comes to photosynthesis, it involves some physical and chemical knowledge. However, the first-grade students lack the basic knowledge in this field, especially the knowledge of energy, which is especially hard for them to understand. If our teachers do not propose energy, etc. Concept, students difficult to understand the nature of photosynthesis. Therefore, this section is difficult for teaching. In my teaching, besides doing a good job of demonstrating experiments specified in the textbooks, I also added “Fluorescence of Chlorophyll” experiment, which aims to help students to understand the concept of photosynthesis and photosynthesis including Two aspects of change: the material conversion process and energy conversion