The Kaplan center has PAT study guides and videos available, however, there is no Saturday class available for review. As far as study aids, use old General biology notes, General chemistry drills, and the Organic drill manual. Taking a Ceramics or Drawing class would be helpful in building your hand-eye coordination and manual dexterity. Chemistry majors might also want to take Psychology 1010. Even though it is not required for your major, some schools require it for admission.
Dental school has the same type of service as medical school does.
However, the applications differ a lot. So, you don't necessarily have to rush to submit you application,however, you don't want to wait until the last minute. Make sure you application is in by no later than July 15th. Since the first group of applications go out in mid-August, it is a good idea to in the first bunch. Patience is a virtue, so be just that.