There are a bunch of movies that feature teachers prominently. In most movies, teachers are a nameless bunch who often times lurk in the background and don't play much of a role in shaping the plot line. The fictional teachers on this list are different. They play prominent roles in the movies they are in and their teaching and mentoring of the characters is an integral part of the movie. Whenever Robin Williams is sporting a thick beard, he is playing a serious role. Playing the parts of John Keating in Dead Poets Society and Sean Maguire in Good Will Hunting, Williams thrived as these characters and they are considered two of the best fictional teachers in movies.
Though he's not a teacher in the traditional sense, Mr. Miyagi proved to be one of the greatest mentors in movie history. He taught Daniel LaRusso (and later Julie Pierce) discipline and how to outsmart and outthink his opponents. On the opposite end of the spectrum is Dewey Finn, played by Jack Black in School of Rock. Not a teacher by trade, Finn taught his class of 10-year-olds life lessons and how to play rock music and by the end of the film, learned a thing or two about himself.
Vote for the teach you think is the best fictional teacher. If there is anyone missing from this list, feel free to add him or her.