National Constitution Center site - which you should check out for information on Constitution Day, "On September 17, 1987, the U.S. Constitution was signed by thirty-nine brave men who changed the course of history. Now Constitution Day is a time for us to continue their legacy and develop habits of citizenship in a new generation of Americans."
Check our these resources suggested by Kristin and Cathy:
In the SERC Library, The Children's March, Teacher's Guide by Jeff Sapp and DVD, IM 960.73 TEA.
The Barber of Birmingham: Foot Solider of the Civil Rights Movement, POV|PBS.
Congress Honors Victims of Infamous Alabama Church Bombing - by Debbie Elliott, NPR blog.