初中化学义务教育教学大纲明确指出:从义务教育的培养目标出发,面向大多数学生,着眼于提高全民族的素质。其中最重要的一条就是:要培养学生科学的学习方法,以养成良好的学习习惯。这不仅为他们今后学习化学这门学科打下良好的基础,同时也是他们学习其他科学知识和今后工作中不可缺少的基本素质。正如叶圣陶先生所指出的:任何功课的最终目的在达到不需要教。也就是说:学是教的依据,教的目的。初中学生有较强的求知欲,具备初步的独立思考和钻研 The junior high school chemical compulsory education syllabus clearly pointed out: From the goal of compulsory education training, facing most students, with a view to improving the quality of the entire nation. One of the most important is: to develop students’ scientific learning methods to develop good study habits. This not only lays a good foundation for them to learn chemistry in the future, but also an indispensable basic quality for them to learn other scientific knowledge and work in the future. As pointed out by Mr. Ye Shengtao: The ultimate goal of any homework is to reach the needless teaching. In other words: learning is the basis for teaching, teaching purposes. Junior high school students have strong curiosity, with the initial independent thinking and research