First, you need to attend all of your class periods. Not attending could hurt you, because you might miss something. The teacher could say something that could be on a test and you wouldn't know about it. They could also give a quiz or an assignment that can't be made up. So it is very important not to miss any of your classes.
Second, do all assignments on time. If you are assigned chapters to read, read them. There may be some information in the chapters that is not discussed in class that might be on a test. Also, do all the homework assigned to you on time. If not points could be deducted. So make sure you do things on time.
Third, take good notes. Make sure to listen good in class and write down things that are discussed. This way you will be able to refer back to them later. You can also take notes out of the chapters you read. Note taking will help you to remember things when it comes to test time. This is a very important part of making a good grade, because if you can't remember what is talked about then you won't do well on a test.
Fourth, make sure to take plenty of time to study. Don't wait until the day of tests
to study, because you will be overwhelmed with information. Start studying three or four
days before the test, so you can just study a little at a time. Then the day of the test just skim over everything so the information can be refreshed in your mind. This is the best way to study and studying is the key to improving.
If you want to do better, just follow these steps. If you attend class, do all your assignments, take good notes, and study in a timely manner things should improve. So this is how to improve a course you have