1, the students' grades are average. At this time, it is necessary to consolidate the basic knowledge in order to be steady and steady, so it is necessary to explain the supplementary books. The supplementary books can usually comprehensively consolidate the knowledge points spoken by the classroom teachers, and some can also improve the types of questions, so that they can master the foundation and get corresponding promotion, which represents the supplementary book "Full Interpretation of New Textbooks"

2. The students got good grades. This shows that the foundation is already very good, and we need to continue to improve and develop our thinking, and we must be able to understand important and difficult issues. This kind of teaching aid also has a representative "excellent student learning case"

In short, when choosing teaching AIDS, you must not aim too high. You should make a choice according to your own situation. If you don't have a good foundation, it will be difficult to do difficult problems, which will weaken your self-confidence. Students with good grades don't need to do simple questions, wasting time, but grasp them.