What are some of main things brush up/study before start school?

Hello,

Well Im on the October list to start school. I pretty much have my financial aid in order for the most part, but Im afraid my new boss will give me a hard time with the schedule. I got "bumped" out of my old position and started training in pharmacy not too long ago. Anyways I graduated with an A.A.S. in Medical Assisting in Dec 2010 from another college (did well I just feel like I got no hands on experience grrr). So I do have some medical knowledge. Idk what are some things I can start studying before school (I hope everything works out for me)? I have med term index cards like thousands probably because I took a med term class before. I also have a medical assistant certification study book that I used in the past. What are some of the major things I should be concentrating on? Also what math stuff and good sites to go to for that etc because I completely forgot how to do even some of the basic math stuff. Thanks!