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在物理的课堂教学中,对于某些抽象的概念、难懂的问题,采取一般的讲授方法,学生往往觉得枯燥无味,难以接受。为了克服这一弊端,在讲课的过程中,恰到好处地打一些比方,将会起到事半功倍的奇特效果。例如在讲加速直线运动的知识时,若问:运动物体的加速度越来越小,它的运动速度将变大还是变小?回答这一问题对初学者来说是比较困难的。我们在分析这一运动过程的时候,不仿先给学生打个比方:某人到银行里去存钱,第一天存入50元,第二天存入20元,第三天存入5元。该人每天存入银行里的钱在减少,但是该人存折上的钱是多了还是少了呢?学生异口同声地回答:多
In the physical classroom teaching, for some abstract concepts and difficult questions, adopting general teaching methods, students often feel boring and unacceptable. In order to overcome this shortcoming, in the course of lectures, playing just the right analogy will have a fantastic effect. For example, when talking about accelerating the knowledge of linear motion, if the question is asked whether the acceleration of a moving object is getting smaller and smaller, will it move faster or smaller? Answering this question is more difficult for beginners. When we analyze this movement, we don’t try to make an analogy for students: Someone deposits money in the bank, deposits 50 yuan on the first day, 20 yuan on the second day, and 5 on the third day. yuan. The person’s money deposited in the bank is decreasing every day, but is the person’s bankbook more or less money? The students answered in unison: more than one person