A world where you already know the answer to every math question that you see

Harry Potter, Ron, Hermione, Draco, Ginny, Luna, Neville, Fred and George, Percy, their answers to the O.W.L. and N.E.W.T. exams are already filled out with the correct answers that they need to pass (Obvious, Exceeds Expectations, Acceptable). This also applies to every other subject that requires written exams in school. Physics, Calculus, Art, History, Programming. Every test you ever have your answer is already filled out. Exams are now only used to see how you get to that answer.