As a high school teacher, what's so great about studying is that studying first starts in the classroom. You want to make sure that when you're in class you've been an engaged and active learner. Sometimes the best high school student is the person who's asking questions, taking notes, and making sure that they understand the material long before the test. Another great study tip is to rewrite your notes. Sometimes, once you've written them in class, if you go back home and you rewrite them again, it refreshes your memory and you're able to expand on the knowledge that you've had in class. Another great study tip is to go back and reference your textbook. A lot of times the teacher, when they've given you notes in class, has only given you just a basic outline, but the textbook can give you great definitions. Textbooks can give you an insight and in depth knowledge about the material. So, always prepare in advance by making sure you understood the material the first time you heard it.