高中生物“生态平衡”一节，内存比较简单、平淡，知识结构松散，用讲述法讲授此课效果不好，容易使学生产生直向枯躁的感觉。怎样才能使这节课的知识活化起来呢？在认真研究大纲、教材和学生的基础上，我采用了“阅读——讨论——写小论文——宣读小论文”的方法进行教学，收 In the “ecological balance” section of high school biology, the memory is relatively simple and plain, and the knowledge structure is loose. The teaching of this course by the narrative method is not effective, and it is easy for the students to feel straightforward. How can we activate this lesson? After earnestly studying the outlines, textbooks, and students, I adopted the method of “reading-discussing-writing small papers-reading small papers” to teach.