http://www.cs.nott.ac.uk/~gxk/games/checkers/research.html this site helped with a lot of the history of the Checkers game.
http://www.dcs.st-and.ac.uk/~ipg/AI/Lectures/Checkers/index.htm this site helped me with the computer game of Checkers and Artificial Intelligence
www.ingleby.com This site helped with images to place on my page.
http://en.wikipedia.org/wiki/Game_complexity This site helped me figure out the right vocabulary to use in my research pages.
www.darkfish.com/checkers/Checkers.html This site has the actual game of checkers on it. I used this site to learn more about the rules of playing.