教材中“摩擦力”的概念比较抽象,但摩擦现象,学生却有着丰富的感性认识,笔者从学生对摩擦已有的生活体验入手,通过简单而有趣的游戏活动开始,结合生活中的事例分析引入摩擦力的概念,再利用实验操作让学生亲身体验摩擦力及影响因素.在这些流程中教者为学生搭建交流、合作的平台,给他们一个思维的空间,学生展开想象的翅膀,发表自己的疑问与见解,从而使他们自主建构新知,盘活思维、悟法 The concept of “friction” in the textbooks is rather abstract. However, the phenomenon of friction, students have a wealth of perceptual knowledge, the author from the experience of friction existing life experience, through simple and interesting game activities, combined with life The case analysis introduces the concept of friction, and then uses the experimental operation to let the students experience the friction force and the influencing factors.In these processes, the teachers build a platform for students to exchange and cooperate and give them a space for thinking, and the students start their imagination. Express their own questions and opinions, so that they autonomously build new knowledge, revitalize thinking, enlightenment