初中阶段是学生身心发展的不平衡时期,他们从情感、意志、能力、智力等方面都表现出了不同的发展水平,差异性随着年级的增长越来越明显。化学属于理科,学生的学习成绩差异明显,在同一班级里若不分类教学,则很难消除学生之间这种日益增大的差距。为此,我结合化学的学科特点,对学生进行了分类施教。实践证明,这样做大部分学生能学会教材的基本内容,达到预定的学习目标,使教学质量得以提高。一、依据学情,合理分组 The middle school stage is the unbalanced period in which the students develop mentally and physically. They show different levels of development from the aspects of emotion, will, ability and intelligence, and the differences become more and more obvious as the grade increases. Chemistry belongs to science, students have obvious differences in academic performance, if not in the same class teaching, it is difficult to eliminate this growing gap between students. To this end, I combine the characteristics of chemistry disciplines, students were classified teaching. Practice has proved that in doing so most students can learn the basic content of teaching materials, to achieve the intended learning objectives, to improve the quality of teaching. First, based on learning, reasonable grouping