一、以趣引课,活用实验教材一般在引出新课或新概念之前,配置演示实验,但在不脱离教学目的的前提下,根据教学需要,可灵活应用。初中学生刚接触化学,许多抽象的概念往往使他们感 First, to draw lessons, use experimental teaching materials In general before the introduction of a new lesson or a new concept, the configuration of demonstration experiments, but without departing from the teaching objectives under the premise of teaching needs, can be flexibly applied. Junior high school students just come into contact with chemistry, and many abstract concepts tend to make them feel