I just taught my new-and-improved version of Beyond the Newbery, which is a class for staff on all the children's and teen youth literature awards. Next one is in December! Anyway, I was reminded (after the class, of course) about the great online resource The Database of Award Winning Children's Books and thought I'd remind you guys as well.
This site has a searchable database of over 70 award lists. You can look for award winners by setting, historical period, suggested age of the reader, race/ethnicity, all sorts of things. When you get a teacher who wants to read a good book to their class, you can point them here and see what comes up.