Nerawareta Gakuen (Psychic School Wars) was originally a 1973 science fiction novel by Taku Mayumura, which spawned a bunch of live action dramas, films, but most recently an anime film by Ryousuke Nakamura over at the lively bunch at Sunrise studios.
Don’t get the name of the movie fool you however since Nerawareta Gakuen is anything more than just a psychic school war epic.