Studying is the most important thing that you need do in order to pass unit tests and exams. My advice to you is to re-read your reading packets. That helps a lot. You should also study over your flashcards that you have to make. Something that I did to study in GOPO was writing down things in class that Mr. Brock said was important on a sheet of notebook paper and then I would look over those notes a few days before the test and keep studying them until the test rolled around. Before the actual exam that determines whether or not you get college credit, I encourage you to review as much as you possibly can. Cut out a certain time when you get home from school and use that time just for GOPO. You work hard all year to pass the exam and without studying you won't be able to do very well.