Saw an article on this movie,it is a real eye opener.
In 1997, Academy Award–winning actor Morgan Freeman offered to pay for the senior prom at Charleston High School in Mississippi under one condition: the prom had to be racially integrated. His offer was ignored. In 2008, Freeman offered again. This time the school board accepted, and history was made. Charleston High School had its first-ever integrated prom—in 2008! Until then, blacks and whites had had separate proms even though their classrooms have been integrated for decades. Canadian filmmaker Paul Saltzman follows students, teachers, and parents in the lead-up to the big day. Freeman addresses the student body. Girls shop for dresses and get their hair done. Boys rent tuxedoes and buy corsages. These seemingly inconsequential rites of passage suddenly become profound as the weight of history falls on teenage shoulders.
http://festival.sundance.org/2009/film_events/films/prom_night_in_mississippi