After each class, you should quickly review the main points of the class to see how much you have mastered and what interesting or unforgettable things have happened. Before each class, you should think about what to learn, how the teacher will teach, what interesting things can happen, and whether you can make funny stories that are easy to remember.
Second, take time out to write a summary of each subject every night.
Before writing the summary, you should indicate the date and week of the day (for easy inspection and review), and then write out the main points of the course you learned that day from memory. At the same time, you can put it in your favorite songs or make it into easy-to-remember jingles. And sing and talk whenever you have time (only by turning knowledge into your own can you remember it firmly). Remember, never read a book, otherwise it will have no effect. If you feel that you owe something that day after writing the summary, you can make it up again and write the summary by memory the next day.
Third, make a big summary once a week and every month.
At the end of each week, you should write out what you have learned in a certain subject this week and your own experience from memory, and then read it carefully according to the daily summary and textbooks to see how much progress you have made.