I would generally put Schindlers List onto the "not-so-family-friendly"-list. It’s educational I guess but I wouldn’t want to show it to anyone below 16. And after that the nudity should be fine.
FWIW, my local secondary school here in the US has no issues showing Schindlers List to students in class. But this attitude isn’t something that would extend to a movie with nudity of a sexual or casual nature.