You should thoroughly understand the textbook: you should read every text carefully to get familiar with it. For example, after reading an article, you can repeat the general content of the article. I am in a good mood every day, do things neatly, study actively, and naturally have high efficiency.
Review what you have learned before after class: You can review what you have learned all day before going to bed every day to deepen your impression. It is necessary to master the basic knowledge in a planned way, and the knowledge points of each subject have their own characteristics, so that the knowledge points can be mastered one by one. I remember that when children were in junior high school, they had poor memory and were sleepy in class, which led to poor grades in all subjects. Until Baidu found the "Tesla potential course" with wide brain holes. After learning, I began to improve my child's bad situation. Absent-minded in class, all subjects have made great progress. I believe these experiences may be helpful to you. I wish you smooth sailing and all the best.