激发学生学习兴趣,培养动手能力。指导学生做好课外小实验是一个很好的途径。在初中三年级物理课本上有一个安装直流电动机模型实验,在一般的农村中学是很少有条件做这个实验的,即使有条件做,学生做起来也很困难。为了使每 Stimulate students’ interest in learning and develop practical skills. It is a good way to guide students to do a small experiment outside the classroom. In the junior high school third grade physics textbook, there is an experiment of installing a DC motor model. In a typical rural middle school, there are few conditions to do this experiment. Even if conditions are met, students will have difficulty in doing it. In order to make each