Find the classes that are right for you. Once you find your local GED test prep classes, you’ll need to register. The process varies from place to place, but when you go, you’ll probably be asked to take a placement test. Don’t worry! This test is just used to find out which classes are right for you. Everyone takes it and it’s nothing to stress out about. When it’s done, you’ll be one step closer to earning your GED diploma.