有些学生进入高一以后,觉得化学比初中的难学多了,听完一节课后,头脑中要装的知识很多,老师讲的东西好像听懂了,但做作业时会遇到很多困难,过几天后,学的知识也忘得差不多了。这样往往会挫伤学生学习的积极性和主动性。要改变这种被动的局面,就要重视发挥知识网络的功能。化学知识乍看起来是零散的,但实际上有其内在的规律性,每一章教学内容的重点、难点,按层层递进的原 After entering the freshman year, some students find chemistry more difficult to learn than junior high school. After listening to a lesson, there is a lot of knowledge in the mind. The teacher seems to understand something, but there are many difficulties in doing homework A few days later, the knowledge of learning also forgot about. This will often dampen the enthusiasm and initiative of students learning. To change this passive situation, we must attach importance to the function of knowledge network. At first glance chemistry seems to be fragmented, but in fact it has its inherent regularity, the focus of each chapter of teaching content, difficulties, progressive by the original