Texas Gov Placement (GOV 310L) Exam

I got a 3 on my AP Government Exam and need to take the Texas Government Placement Exam tomorrow and pass it in order to get credit for GOV 310L. I know that since I got a 3 on my AP Gov test, I need to do better on the placement test than kids who got 4’s or 5’s. I have heard students say that there is no real way to study for this but maybe look at the wikipedia page (the study supplement my counselor recommended for me cost $50). Can anyone that has taken this test share their thoughts on it and give me advice?

Thanks a ton