You think your school's scary? Get a load of these teachers: Ms. Fang, an 850-year-old vampire Dr. Dragonbreath, who just might eat you before recess Mr. Snakeskin—science class is so much more fun when it's taught by someone who's half zombie Mrs. T—break the rules and spend your detention with a hungry Tyrannosaurus rex! Plus Gargoyles, goblins, and Frankenstein's monster on the loose The…