In the original movie, the cyborg-teachers were all destroyed. Well that's what we thought, but there's one more rogue military robot out there determined to clean up the education system.
Class of 1999 II: The Substitute
The substitute teacher of the future is a robot who answers spit-wads with bullets. He'll clean up the gang situation at the school, too, if a government agent doesn't catch him first for an experimental robot army.