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摩擦力一直是初中物理教学中的难点。那么到底难在何处,如何引导学生克服难点?一、教学难点分析难点有两类矛盾:一是感知矛盾,即感受和体验情境时所发生的矛盾;二是认知矛盾,即形成科学认知时所发生的矛盾。这些矛盾是学生初中物理学习症结所在,也是教师针对性处理的落脚点。1.活动情境产生的感知矛盾(1)活动情境设计苏科版以图片的方式引导学生通过活动体验滑动摩擦力的存在:如图1,拉动木块令其进行匀速
Friction has always been a difficulty in junior high school physics teaching. So difficult in the end where to guide students overcome difficulties? First, the difficulty of teaching analysis difficult There are two types of contradictions: First, perceived conflicts, that is, experience and experience of the situation when the contradiction; the second is the cognitive contradiction, that is, the formation of a scientific recognition Conflicts that happen when we know. These contradictions are the crux of the students ’junior high school physics learning and the foothold of the teachers’ targeted treatment. 1. Perception Contradictions Caused by Activity Situations (1) Design of Activities SUKU uses the pictures to guide students to experience the existence of sliding friction through the activities: as shown in Figure 1, pull the blocks to make them uniform