各门化学的实验课和演示实验到目前为止,大都是验证式的。例如在元素的教学中,一般都是按某元素及其化合物的性质、制法,用途去选择实验内容。实验的目的就是验证“预先”知道的结论,然后在课堂上进行演示。这种教法从教师如何教的角度来看,是积累不少经验的,但对学生如何学来考虑是重视不够的。近年来国外有人提出“发现式教学”和“发现式 The experiments and demonstration experiments of various chemistry have so far been mostly verified. For example, in the teaching of elements, the selection of experimental content is generally based on the nature, methods, and uses of certain elements and their compounds. The purpose of the experiment is to verify the “previous” known conclusions and then demonstrate it in class. This teaching method has accumulated a lot of experience from the perspective of how teachers teach, but it does not pay enough attention to how students learn to think about it. In recent years, foreigners have proposed “discovery teaching” and "discovery