一、初中女生的异常心理是男女生学习成绩分化的主要原因。笔者曾经对我校９６届毕业生做过跟踪调查：初一男女生学习成绩大体相当，女生略好一些。初二中后期，女生成绩开始呈不断下降趋势，到初三已有明显差距，这种差距到高中后仍在发展。显然，成绩分化出现在初二中后期。 First, the abnormal psychology of junior high school girls is the main reason for the differentiation of academic achievement between boys and girls. I have done a 96-year follow-up survey of our school graduates: the first boys and girls generally comparable academic performance, slightly better girls. In the middle and late second semester, the performance of girls began to show a downward trend. There was a clear gap between the first three days and the gap was still developing after high school. Obviously, the grade differentiation appeared in the second middle and late period.