Great movie. Interesting, thought-provoking and emotional plot. A bit idealistic though. Also has some dead end sub-plots. Ending is a bit abrupt and could have done with some polishing. Still the original teacher-gets-through-to-some-unteachable-kids movie though.
Superb performance by Sidney Poitier in the lead role. Good support from a cast of mostly unknowns.
The theme song (by Lulu, who also stars in the movie) is excellent too. (The cover version, live, by 10,000 Maniacs and Michael Stipe is even better)