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中学物理实验中的演示实验,是一种由教师结合教学内容演示给学生观察的实验,在演示教学中,能让全班学生清楚地观察到演示现象,是学生获得感性知识的关键,也是学生以物说理推出物理结论的基本途径。由此看出:演示实验的可见度如何,便成了教学成败的关键。如何改进教材所述的演示教法来增大演示实验可见度,也就成了中学物理实验教学中的教改课题之一。 针对这一教改课题,我在教学实践中,采取了以下四种教法,改进了教材所述的演示教法,增大了演示可见度,收到了较好的教学效果。 1.用投影手段辅助演示实验。 把教材中的某些可见度小,而又适合投影演示的实验搬到投影仪上去演示,其演示现象可以在屏幕上清楚地观察到。我在进行“奥斯特”实验的演
Demonstration experiment in middle school physics experiment is a kind of experiment that the teacher combines the teaching content to demonstrate to the student. In the demonstration teaching, it can make the whole class students clearly observe the demonstration phenomenon. It is the key to the students to acquire perceptual knowledge and it is also the student. The basic approach to introducing physical conclusions based on physical theory. From this we can see that the visibility of demonstration experiments has become the key to the success of teaching. How to improve the teaching method described in the textbook to increase the visibility of the demonstration experiment has become one of the teaching reform topics in physics experiment teaching in middle schools. In response to this teaching reform project, I adopted the following four teaching methods in teaching practice, improved the demonstration teaching method described in the teaching materials, increased the visibility of presentation, and received better teaching results. 1. Use projection methods to assist in demonstration experiments. Some experiments in the teaching materials that are small in visibility and suitable for projection presentations are moved to a projector for demonstration. The demonstration phenomenon can be clearly observed on the screen. I was performing an “Oster” experiment