Student Complaints in Hogwarts (I would like to say that I think math is taught all along. How could these kids make any of their potions if they can't do math? Just my two cents as a Harry Potter nerd.
"I assure you that if you die, you need not hand it in." Should have been in the Harry Potter movie. (This scene was, but not these words. In the film, this scene was where McGonagall explained the Chamber of Secrets.