I am trying to remember the name of a "teacher" movie I saw a long time ago. There was a scene where the teacher and his students are walking in the city. The teacher has a few of his students go up to a few strangers (as they are, all hip, macho, 'cool', etc.) and ask a question. The strangers walk off, not answering the question and act afraid of the students. He then has another group walk up to the students and has them ask the same question in a very mannerly fashion and they are well received by the strangers. Does anyone remember this movie? I thought it was "To Sir, With Love" with Sidney Poitier but it's not. Thanks! I'd like to show that clip to some students if I can find the movie.

Could possibly be an episode of "Head of the Class," 1986?

Head of the Class: Season 01 (1986) - Synopsis - MSN Movies (http://movies.msn.com/movies/movie-synopsis/head-of-the-class-season-01/)