More of a cop murder-mystery than a slasher film, but it's still kinda interesting in a laid back, made-for-TV looking kind of way even though it wasn't made for TV. From what I can tell NIGHT SCHOOL actually had a short theatrical run back in 1981.
Some of the women attending or working around Wendell College have been turning up with their heads chopped off, naturally the cops get involved and a young detective is determined to solve the case. And since he only has like four suspects I'm pretty sure he can figure it out. A small smattering of blood, zero gore, lightweight nudity, medium pace, soft focus that gives everything a weird fuzzy look, 80's fashions, Boston locations, okay acting, zero scares. Worth checking out for slasher completists.