Coins
Keep parties running. If you do not need a specific student to join you, send random students for a party then sell the student that you get. Repeat the process as many times as desired. Maximize your coin revenue through hangouts. Fill your hangouts with students so they make money as fast as possible. Because you can sell them, whenever you get a special student sell one you do not need and they will keep making money. The higher the level of your students, the faster they will produce money. However, but the amount cannot exceed the maximum level of the hangout. This is why it is best to have more Nerd and Jock Hangouts to maximize revenue. Send your students on dates and develop their relationships.