1949年春天,解放初的北京中学,市立的不到二十所,其余大都是教会或私人开办的。学校化学课的设置、课时安排、教材内容等一般都沿袭着解放前的习惯,各校极不统一;化学教学方法多半是“先生讲学生听”,“先生黑板抄书,学生本上誉写。”有的学校更是随教师兴致所至想讲什么就讲什么。实验教学更 In the spring of 1949, at the beginning of the liberation of Beijing, there were less than 20 schools in the city, and the rest were mostly church or privately run. The setting of school chemistry courses, the arrangement of classes, and the content of teaching materials are generally followed by the pre-liberation habits. The schools are extremely inconsistent; most of the teaching methods for chemistry are “Mr. Speaking Students Listen,” “Mr. Blackboard Transcriptions, and Students’ Honors.” "Some schools even talk about what they want to talk about when teachers are interested. More experimental teaching