编辑同志: 我儿子上小学二年级,最近出现一个奇怪的现象,一些明明在家已掌握的知识,考试时却常常出错,请问这是怎么回事? 云南常明常明同志: 很多辅导过孩子学习的家长都有这样的体会:孩子在家明明会做的题,到学校一考试就不会了, Editing comrades: My son was in grade two of primary school. Recently there was a strange phenomenon. Some of the knowledge that was clearly known at home but often failed in examinations. What is going on here? Comrade Chang Ming of Yunnan: Many counselors have learned from children Parents have this experience: the children will do at home, the question, to the school will not be a test,