High school is three years, not one year. Even if you can stay in Grade One now 150, there is no guarantee that you will get good grades in Grade Three or the college entrance examination in the future. When I was a freshman, my grades were generally high. If you really want to learn math well, you must revise and accumulate wrong questions, summarize them every month, make the notebook thick first, review it again and make it thin. There is also a need to establish a mathematical system and choose a system to master everything. In order to draw inferences from others, we are not afraid of innovation or change. Finally, a certain amount of training. There are always people who say that the tactics of asking questions are not good, so reduce the number of questions. As we all know, only by practicing more can we improve the speed and proficiency of doing problems. After senior three, sometimes it's not that you can't do the questions, but that you don't have enough speed, and so do other subjects.