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现行高中化学教材中共有11个选做实验。教学中,由于受教学时间安排、实验条件、传统教学思想观念等多方面因素的影响,很多教师忽视了选做实验,甚至不做选做实验,浪费了这一教学资源。笔者在教学中注意把选做实验放在适当的时候以恰当的方式处理,收到了良好的教学效果。1 教材中选做实验的分类根据实验的特点和能力要求,教材中的选做实验大致可分为三类:
There are 11 selected high school chemistry textbooks as experiments. In teaching, due to the influence of many factors such as teaching schedule, experimental conditions, traditional teaching ideas, etc., many teachers neglected to choose to do experiments, or even not to do experiments, wasting this teaching resource. In the teaching, the writer pays attention to selecting and doing the experiment in an appropriate manner when properly handled, and receives good teaching results. 1 Classification of Selected Experiments in Textbooks According to the characteristics and capability requirements of the experiments, the elective experiments in the teaching materials can be roughly divided into three categories: