Cassie - i dont think they make you take them out.. no reason why they should.. i still have 2 of my wisdom teeth and a lot of classmates still have theirs so nothing to worry about!
FutureQFA - the opg is to identify you in case of.... =/ sounds scary doesnt it!
and the time for ground school varies! i was lucky.. my GS i had very good times with most nights we finished before 11. there was only once we finished at 12:30 and another time at 2am. Another group who was on the same time as me started almost everyday at 4-5pm and always finished after midnight!