The school is big and has lot of classes. It has 6A,6B,7A,7B,8A,8B,9A.9B,10A, and 10B. The classes and the order they start in is shown in the Timetable in the pause menu. The classes are also shown on the map. If the player is late the teacher will mention it, while if they player skips it completely, they might find themselves wanted for truancy and possibly sent to the principal's office.
In the school, many things you would usually have to pay for can be taken for free, if you know where to go.
The Cafeteria is used for a class, Cookery, as well as Lunch. However, Lunch is not free. Entering the Cafeteria at Lunch costs $5.