First of all, we need to cultivate good habits, that is, we need to preview before class and review after class. Preview what the teacher needs to say in class before class, so that you can better follow the teacher's ideas in class and better understand the knowledge points the teacher has said. Reviewing what the teacher said in class in time after class can help you master these knowledge points more firmly. In this way, you can reduce the time you spend on your homework after class. In some subjects, the knowledge points in the previous chapter and the latter chapter are related. If the knowledge points in the previous chapter are well mastered, it will actually be very helpful for the study in the next chapter, which is a virtuous circle. In the long run, the learning efficiency will naturally improve slowly.
Secondly, if you want to study efficiently, you definitely need to study in an atmosphere suitable for your own study. If you want to write something about thinking about people, you need to find some quiet environment, such as library or study room. If you want to recite something to make noise, you need to find some noisy atmosphere, or you can read aloud in a quiet forest. Different subjects need different learning methods. For example, things that need to be memorized, such as English, need to be memorized loudly, while things that need to be pondered, such as physics and mathematics, need to be pondered quietly.
Finally, in my opinion, it is necessary to make a study schedule. Moreover, this study schedule needs to be carried out according to your own study efficiency, and you can't pursue time efficiency in an empty way, but you should determine it according to your own actual situation. And you need to refine the time, which can be accurate to minutes, and you can study different subjects at a time suitable for studying a certain subject.