对中学化学教改的简略回顾笔者自５０年代初从事中学化学教学至今，感到每种教法的优缺点并存，有不少教师为了发挥各自的优势，选择或创新各具特色的教法，所以，教改中总有滞后和超前等多种教法同时存在。回想起来，大致经历三个阶段。１．知识型教学。从１９０２年化学... A brief review of the teaching reform of chemistry in secondary schools Since I was engaged in chemistry teaching in middle schools since the early 1950s, I feel that the advantages and disadvantages of each type of teaching exist side by side. Many teachers, in order to give full play to their respective advantages, choose or innovate their own distinctive teaching methods. There are always many teaching methods such as lagging behind and advanced in teaching reform. In retrospect, we go through roughly three phases. 1. Knowledge-based teaching. From 1902 Chemistry ...