National Constitution Center
Interactive Constitution
Did you know there are seven Articles and 27 Amendments to the US Constitution? Explore each and every one of them, including the Bill of Rights and other rights around the world, in a super neat US Constitution interactive.
University of Groningen
American History: Essays: The Original 13th Amendment
Links to essays that debates the validity of the original 13th Amendment.
Ducksters
Ducksters: Holidays for Kids: National Freedom Day
Kids learn about National Freedom Day. This site discusses the history and facts about this holiday which commemorates the 13th amendment.