In this ground-breaking role, Sidney Poitier stars as Mark Thackeray, an idealistic engineer who is forced to accept a teaching post and to discipline unruly class from a rough neighbourhood.
He also has to ward off advances from one of his students and avoid getting involved in his students personal affairs.
The film was made in 1967, but it's still a goodie. Poitier already had an Oscar under his belt and delivered a flawless performance.