To Sir With Love
Is the story of an engineer who takes over a class at an alternatively structured school somehwere in England. He has a revelation when he realizes his unruly class aren't just kids - they are kids on the verge of graduating and becoming adults. Figuring out what they can really learn from him in the time they have left in school is a mutual process that's rewarding to watch.
Guess Who's Coming To Dinner?
This classic movie whose cast includes Spencer Tracy and Katherine Hepbourn is about a liberal young white woman who brings her black fiancee home to meet her parents. Keep in mind this is set in a time when mixed marriages were still illegal in some 17 states. Her parents (who raised her to be liberal in the first place) face a challenge in figuring out what they think of this problem in just one day.
Interestingly enough, they have a pretty cliche sort of "mammie" role in this movie, of the black maid who was the young woman's nanny. it seems a little out of place but I think they were just trying to highlight how different the younger generation was from the previous one.