The protagonist is a guy, and from what I understand he becomes a teacher at a really tough public highschool. He goes into a bathroom crowded with kids, where some girl is selling drugs, and pulls her out of the stall and flushes the drugs down the toilet. In one scene, other teachers are arguing with him. In one scene, he's at home making coffee while saying to himself "SOMEONE'S gotta clean this place up" The guy reminds me of Bill Murray. The movie looks like it's from the 80s. It could be a TV show rather than a movie, but I doubt it.