As I have recently decided to go back to school, I figured that I would need a LOT of catching up in my math studies before I even attempted to register for classes. Its been 10+ years since I have been in a classroom setting. So, I started my studies with prealgebra. I didn't have a textbook, but I aided my studies with the help of khanacademy.org. At first I was super psyched on that website, however I now feel that as good a job as Mr. Khan does, he does not provide all the necessary background information needed for a lot of the topics he covers. I also feel like a lot of the information covered was not necessarily on the level of prealgebra, though, I could be wrong as its been 12 or 13 years since I last took prealgebra. My main concern was with a lot of the work done with polynomials.
Anyway, what I'm trying to get at here. Can anyone recommend some practice tests online or otherwise that I can take to assure myself that I am prepared to move past the level of prealgebra? And, where would I go from prealgebra? Would it be smart to jump into geometry first, and then come back to algebra?