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学生在解答一些难度较大的物理题时,常惑到困难和出现错误的地方并不是整个问题,而是问题中某一个或两个难点。针对上述情况,我在长期教学过程中常常认真留意搜集这些难点,把它从复杂的物理问题中“抽”出来分类编成结构简单、问题突出的所谓物理小题,作为指导学生解题的例题或思考问题,这样的题目有利于帮助学生突破难点、减轻学生学习负担、节省时间、提高解题能力。以下列举数例说明。
When students are answering some difficult physics questions, it is not the whole problem that often causes difficulties and errors. It is one or two difficulties in the problem. In view of the above situation, I often pay serious attention to collecting these difficulties during the long-term teaching process. I pluck it out of complex physical problems and classify them into simple physical problems with outstanding problems as guidance for students to solve problems. Examples of problems or thinking problems, such topics are conducive to helping students overcome difficulties, reduce student learning burdens, save time, improve problem solving skills. The following shows a few examples.