Ok so I've done KBB, Cliffs AP Bio, chads videos, DAT Destroyer and datqvault. I took the first two Topscore tests and got 18 and 19 AA and the first two Achiever and got 16 and 17 AA. My test date is August 30 so I've still got some time. What I seem to struggle the most with is O chem and Bio. Everyone suggest chad's videos and I did them, but am still struggling. What do you guys think I should do in the next few weeks to fully prepare myself to get the best score possible. I have one achiever and one topscore test left. Thanks for your help