There are a variety of classes taught at Hogwarts School of Witchcraft and Wizardry. These include both the core curriculum and the electives, available from third year forward. In the fifth year, students take the Ordinary Wizarding Level (O.W.L.) exams to determine whether they can achieve a score high enough to continue to N.E.W.T.-level (Nastily Exhausting Wizarding Test) for the class in the remaining two years. Some classes, including the core classes, may be dropped in sixth year. Specialised classes become available in sixth year provided there is sufficient demand.

Even though students cannot apply for Time-Turners to take more classes than are able to fit in the timetables, a student's head of house may suggest a Time-Turner to an individual on very rare occasions. All students do, however, have a choice to drop courses if they become a burden (aside from the essential classes).

Here are examples of the many Hogwarts Subjects:

1.) Transfiguration
2.) Defense Against the Dark Arts
3.) Charms
4.) Potions
etc...