通过课堂观察,分析教师课堂中一些演示实验存在的疑难点,借此问题为突破口,利用生活中的一些器材开发一系列“高见度”创新实验,并以此来突破演示实验的那些疑难点,从而提高教学效果. Through classroom observation, this paper analyzes the difficult points in some demonstration experiments in teachers’ classrooms, and takes the problem as a breakthrough to develop a series of “Visibility ” innovative experiments by using some of the equipment in life, so as to break through the difficulties in demonstration experiments Point to improve teaching effectiveness.