Class also gives your dog something important that he doesn't get at home - distractions. They often forget all their training when they're out in the real world where there's so much to see, smell and chase. In class, you'll learn how to keep your dog's attention even though he's in a strange place with all kinds of interesting things going on around him. She was the best dog there. Now that classes are over, though, she doesn't pay attention anymore and acts like she didn't learn a thing.
Obedience class is just the first stop on the road to a well-trained dog.
What you learned in class was how to train your dog. In class, you were taught how to give commands and how to enforce them. You learned how to encourage your dog to do the right thing and how to correct her when she made a mistake. What you need to do now is apply what you've learned to your everyday life with your dog. To get your dog to behave well at home, you need to follow the same procedures that you did in class.