演示和学生实验在中学物理教学中十分重要,它们对加强基础知识教学和培养学生的能力都起着重要作用。演示是教师在讲台上表演,学生没有动手的机会,不利于提高学生的实验技能,有些演示现象不够明显,物理过程变化很快,学生不易观察清楚。所以还应多安排一些学生亲自动手的分组实验,让他们独立进行实验,边观察、边测定、边思考、边分析、边总结。我们除了按要求完成新编初中上册课本所有学生实验外,在不增加教学总时数和实验设备的前 Demonstrations and student experiments are very important in physics teaching in middle school. They play an important role in strengthening basic knowledge teaching and cultivating students’ abilities. The demonstration was performed by the teacher on the podium. The students did not have the opportunity to do so. It was not conducive to improving the students’ experimental skills. Some of the demonstrations were not obvious enough. The physical process changed quickly and the students could not easily observe clearly. Therefore, it is also necessary to arrange some groups of students to experiment with hands-on exercises so that they can conduct experiments independently, observe, measure, think, analyze, and summarize. In addition to completing all the student experiments for newly-edited junior high school textbooks as required, we did not increase the total number of teaching hours and laboratory equipment.