在五十年代,普通中学每个班的学生人数大都是40至50人。近年来相当数量学校班级人数急剧增加,已超过60人、70人,甚至一个班有80人以上的。增加人数的结果怎么样呢?我做了一个调查,结果是:教学效果下降,不利于为四化培养合格人才。班级人数过多,教学效果不好的原因:①教师讲课时,对学生照顾不过来。教师讲课必须加高声调、拉长音调,不然坐在后边的学生听不清。②板书字迹要加大、内容要减少;教具、模型、挂图都要加大规格。不然,坐在后边的学生看不见。③学生反映:坐在两边和前面的看不全;坐在后边的看不清。④课堂上被学生和桌椅占满,影响教师的巡视和辅导;课后,加重了教师批改作业的工作量;上实验课就更艰难了。⑤学生人数过多,使教室内空气缺氧,有的学生反映头脑昏沉沉,影响身心健康。由此可见,班级人数过 In the fifties, the average number of students per shift in general secondary schools was 40 to 50. In recent years, a considerable number of school classes have sharply increased in number, having exceeded 60, 70, and even more than 80 in a single class. How to increase the number of people? I did a survey, the result is: teaching effectiveness is not conducive to cultivating qualified personnel for the four modernizations. Excessive number of classes, poor teaching effectiveness reasons: ① teachers lectures, however, to take care of students. Teachers must raise the tone of lectures, lengthen the pitch, or sitting behind students can not hear. ② blackboard writing to increase the content to be reduced; aids, models, wall charts have to increase specifications. Otherwise, the students sitting behind can not see. ③ students reflect: sitting on both sides and in front of the inscrutable; sitting behind the invisible. ④ Classroom occupied by students and tables and chairs, affecting the teacher’s tour and counseling; after class, aggravating the workload of teachers to modify homework; the experimental class is even more difficult. ⑤ too many students, so that classroom air hypoxia, and some students reflect the dizzy head, affecting physical and mental health. This shows that the number of classes over