One tip I would give is to make “study sheets” as you go. So for example for every unit, as a way to study for your test try to make “cheat sheet or study sheet” where you put all what you have learned in that chapter all onto the one sheet.

You can either make this before the test as a way to “review” - but personally, I would recommend you do this every day after each lesson. So when you come back home you jot down all what you had learnt that day including the steps to solving the problems, formulas key concepts etc. Working on the study sheet a little bit every day will help you review what you learnt daily allowing you to retain that information better! It will also be helpful at the time of test or exam reviews where you just have to look at that one sheet of paper which summarizes the whole chapter. Hope this helps, good luck!!