习题课是化学教学的重要组成之一,它具有纵横的知识网络、完善的知识系统,能达到培养学生各方面能力和促进教学效果的作用。在初三化学教学中,学生在掌握了化学知识后,在解决实际问题时,有时候仍然会有一些困难。因此,我认为初中化学习题教学一定要根据新课程的要求,科学、有效地选择习题、讲解习题, Exercises is one of the important components of chemistry teaching. It has a vertical and horizontal knowledge network and a complete knowledge system, which can help to cultivate students’ ability in all aspects and promote teaching effectiveness. In the first three days of chemistry teaching, after students master the chemical knowledge, sometimes there will still be some difficulties in solving practical problems. Therefore, I think junior high school chemical problem teaching must be based on the requirements of the new curriculum, scientific and effective choice of exercises, explain exercises,