Here is the text (and audio) of Dr. Martin Luthor King's "I Have A Dream" Speech.
Here's a Black History Challenge Quiz from Quia:
Here are some Black History Resources from Nick Jr.
Here's an Underground Railroad Activity from Scholastic:
Education World has some resources too:
Here's some History and Fact information from Factmonster
With thanks to Elementary Librarian and RMR for finding some of the informatino on this page.