Most outstanding is the Library of Congress's African American Mosaic, with information on all issues related to the study of black history and culture. Also notable are the Smithsonian Institution's resources, including its African American History and Culture directory, and Digital History's online textbook African American Voices. Also, the nonprofit African American Registry is a great source of information about African American history.
As a teacher, I realize that time is a problem and that these resources are a little late coming to you. I hope, however, that you will find some windows of time to use them in meaningful ways.
I am reminded, even as I post this, that members of many of other minority groups will say, "Well, what about resources for me?" Thank heavens for Google -- with all the resources available on the Internet, we can, all through the year, be more multiculturally inclusive. For example, check out Ask.Asia and the vast resources of the National Geographic Society.
A Sampling of Online Black History Month Teaching Resources
The Father of Black History Month
How did Black History Month start? The Association for the Study of African American Life and History and The Freeman Institute have information about writer and editor Carter G. Woodson.
The Buffalo Soldiers and the Civil War
A number of Web sites chronicle the African American experience during the Civil War, including Buffalosoldier.net. (Did you know that there were female buffalo soldiers?) The International Museum of the Horse has information about daily life on the Western frontier.
Great African American Leaders
MLK Online has a biography of Dr. Martin Luther King Jr., a selection of his speeches, and other facts and information about him. And Scholastic has compiled profiles of notable African Americans and other resources.