Diver Prep Education

[great_white_nei]

First Post. I am a DEPer who has already received my ND contract and i ship for BC in 80 days. I can pass the PST easily and have no problem with the treading or the swimming. What i am looking for insight on is what subjects should i look into studying and reading up on to better my education on what you learn at Dive Prep. I want to be not only physivaly ready for Dive Prep i want to have at least a slight grasp as to study material as well.
Thank you:
:newbie:

[FutureND]

Just learn the gas laws.