Joe Clark was both a villain (in the first half) and a hero in the 1989 movie Lean on Me. He was played by Morgan Freeman. The second half of the movie is really how the real Joe Clark would have been. Joe Clark, in the movie starts off as an angry jerk who wants to change the school, but does some fairly horrible and mean things to others (like humiliating a kid for a petty thing, like stealing someone's food), and humiliating a teacher like Mr Darnell for picking up someone's thing on the floor, while they were observing the school song.