Drugs 1:

Sit up straight in class, lean forward as far as possible (leaning against the table is best, but you must sit up straight), look at the blackboard or the teacher with your eyes, and clear all the messy things in your mind when you ring the bell-to help you open your eyes, not to talk, not to make small moves.

Medicine 2:

Force yourself to listen carefully to every word of the teacher, respond with "hmm" (even if you say it quietly to yourself, but only if you really understand), and seriously think about every question of the teacher-only in this way can you keep up with the progress of the teacher and make you feel that 45 minutes have passed.

In this way, you will find that the class is over before you doze off. When you master the content of the class, you will have a great sense of accomplishment. )

Note: if you persist in this way for three weeks, you can form a habit.

The premise of medication is to ensure adequate sleep.