"The Story of Film,"a 15 part documentary series airs Mondays & Tuesdays at 8pm in September on Turner Classic Movies. The series is based on the book of the same name. TCM is also airing movies featured in the series. See the entire schedule here.
In additional to his excellent series on the history of film, I also recommend Mark Cousins' film "The First Movie." He takes video production equipment and cameras to an isolated village to introduce viewing and making movies to children who haven't experienced either. This film runs about 70 minutes and has lots of potential for classroom use.