Hi Berdnikoff,
There are lots of different study materials that you might use over the course of your studies. While you might be thinking about an 'offline', in-person class setting, that option presents a number of 'restrictions' that can make it inconvenient (such as classes only being offered at specific times and locations that might not fit your schedule, unclear make-up options for if you 'miss' a class, ending up with an instructor who is not to your liking, etc.). You should certainly investigate all of the available options, but you would likely find it easier (on a variety of levels) to enroll in an online Course of some type (either Guided Self-study or instructor-led).
Since it sounds like you're just beginning your studies, then it would be a good idea to take a FULL-LENGTH practice CAT Test; you can take 2 for free at
www.mba.com (and they come with some additional practice materials). If you want to do a little studying first, so that you can familiarize yourself with the basic content and question types, then that's okay - but you shouldn't wait too long to take that initial CAT. That score will give us a good sense of your natural strengths and weaknesses and will help provide a basis for comparison as you continue to study. A FULL CAT takes about 3.5 hours to complete, so make sure that you've set aside enough time to take it in one sitting. Once you have those scores, you should report back here and we can come up with a study plan.
I'd like to know a bit more about your timeline and goals:
1) What is your goal score?
2) When are you planning to take the GMAT?
3) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich