Class of Nuke 'em High: 3 - The Good, The Bad and the Subhumanoid (1986)

At Tromaville High School, located a stone's throw from the local Nuclear Power Plant, the students are getting brighter. In fact, they're beginning to develop a Troma-green glow. Innocent students mutate into sex-crazed psychos, the Honor Society's turned into carnivorous, kinky cretins, and the slimy monster stalking the hallways isn't the principal!