The Taming of Rebecca (1982)

 George Payne plays the headmaster of a school where Rebecca ends up after 

running away from her sexually abusive father.When she gets there,Payne's 

assistant introduces her to the other pupils and it doesn't take Rebecca 

long to find out that everyone is pretty much screwing everyone else. When 

George Payne and Niko find out what's going on,they punish the students 

severely. The score lifted from John Carpenter's "Halloween" actually makes 

it even more unsettling. "The Taming of Rebecca" may be too much for casual 

fans of hard core porn,but everyone who is into extreme cinema should give 

it a look. (IMDB HumanoidOfFlesh)