Organization: This as my jam in school. Tabs, the best way to take notes, color coordination, binder layouts based on class schedule. I have so many notes I can send you.
Bullies: I never quite figured this one out myself. It was hit an miss for me. Mostly miss.
Slang: Like...all slang?
Cafeteria food: Depends on the school. It's usually trial and error. There are probably some things more edible than others. See if you can get any insight from other students.
Vampires: The closest thing to a vampire in my high school was me (not a vampire), but that does seem to happen a lot in other worlds?
Gym sports: I think your own athletic ability has an impact on how much or little you get out of this class.