A good memory is better than a bad writing. When the teacher speaks in class, you should take notes. Although I seldom take notes after going to college, I usually write them down on my computer or just keep them in my heart. But if you are worse than others, you should take notes. Taking notes will greatly deepen your memory. Review after you go back, read everything the teacher said today and think about it carefully.
Also, ask the teacher immediately if you have any questions you don't understand. If the teacher is inconvenient, you can ask your classmates around you. I believe that the students around you are still happy to teach you. In fact, I am also a person with a poor brain. Usually, I can't keep up with my classmates' progress in class, and I often feel very backward because of my backwardness. Sad, this will make me feel frustrated and affect my study. In this case, self-confidence and mentality must be stable, otherwise you will fall behind even more.
Don't envy anyone, just be yourself. Some students may learn faster, even if they play exams every day, they still get high marks. We don't have to envy such people. Everyone has his own specialty. Maybe your specialty lies elsewhere, but you may be a little slow to learn.