Harry Potter Logic Puzzle II
Hermoine can use the Time-Turner to save Buckbeak but not Sirius Black, so we are not sure logic plays a vital role in Harry Potter land.
Hogwarts Charms Exam
Technically this is an exam, but charms are a heck of a lot more fun than math.
Young Adult Bunker
Characters in YA novels all had a way more interesting high school life than we did.