演示实验是教师通过实验设计和操作,在课堂上引导学生对实验现象进行猜想、观察、分析、归纳和总结的教学活动。演示实验的有效性是关系到“知识与技能”“过程与方法”和“情感态度价值观”这三个维度的教学目标是否能高效实现的重要因素,提高物理演示实验教学的有效性对于增强物理教学效果具有十分重要的作用。 Demonstration experiment is the teacher through experimental design and operation, in the classroom guide students to experiment on the phenomenon of conjecture, observation, analysis, induction and summary of teaching activities. The effectiveness of the demonstration experiment is an important factor related to whether the teaching goal in the three dimensions of “knowledge and skills”, “process and method”, and “emotional attitude and value” can be efficiently realized, The effectiveness of physics teaching to enhance the effectiveness of a very important role.