If in your dream you see your classmate, in real life you will have a problem, which you can solve only with the support of friends. If you dream that you meet your former classmate, but he passes you by, then in reality you spend too much time at work, forgetting about your responsibilities to family and friends. The dream in which you came to the reunion means that you are not satisfied with communication with people around you and you miss the warmth of communication.
If in a dream you met your classmate, then in reality you will have a pleasant meeting with interesting people. If you dream that a classmate asks you to help him with his studies, then in real life you should pay off your debts and fulfill all your obligations.