Within the first few minutes of “Mr. Robinson,” a summer replacement series about a high school music teacher that debuts Wednesday night on NBC, there are references to “bitches,” a joke using very specific language about the male anatomy, and a teacher who moonlights as a stripper.
We’re a long way from “Room 222.
”And we can probably blame “Bad Teacher,” the 2011 Cameron Diaz movie, for laying the groundwork for movies and TV to think of teachers less as bright-eyed idealists and more as scheming, sex-starved realists.