Nude Celebs: Marsha Dietlein -

A man returns to teaching as a substitude to find that the public high school he's at is a nightmare of kids assaulting teachers, a female teacher molested at gunpoint, and students beating students every day.

Sounds exactly like The Substitute, but then things get very strange as six particularly troublesome students find themselves naked in electrified cages with no way out, no food, and no water. To survive, they must "learn".

While this movie is a little too weird to be called good, it is different. I think you'll find the clips very interesting.