Primary school mathematics is mainly based on calculation, but after junior high school, mathematics has developed into a complex, abstract and rigorous feature. 2. Due to the lack of teaching content and sufficient class hours, the class hours in primary schools have changed. Therefore, the class capacity is small and the progress is slow, so there is enough time to repeatedly emphasize the key and difficult contents. The teacher has time to give examples and demonstrate the solutions to various exercises. Students also have enough time to consolidate. In junior high school, due to more knowledge points, increased flexibility, large class capacity and rapid progress. This also makes junior one students not adapt to junior high school mathematics learning. 3. The change of primary school learning style, the teacher talked in detail and practiced more. In the exam, students can generally get good grades as long as they remember the concepts, formulas and example types mentioned by the teacher. Therefore, students are used to turning around the teacher, not paying attention to independent thinking and summing up the law. In junior high school, you can only choose some specific and typical topics. Therefore, students are required to be diligent in thinking, be good at summing up laws, and master teaching ideas and methods. For freshmen, the learning methods of primary school are still used, and the study habits of preview, review, summary and self-adjustment have not yet been developed, which is obviously not conducive to the formation of good learning methods and the improvement of learning quality. More importantly, it is the best teacher to cultivate students' interest in learning. Let every student be interested in learning mathematics. Some students are not good at math in primary school. As a senior one math teacher, we should let these students put aside the shadow of thinking that they are poor in math and let them regain their interest in learning math. We can make students get excellent results in the first exam and let them taste the happiness they have never had before.