Sources for Background Information: Every research project should start with getting some background information about your topic...and the best place to do this is in an encyclopedia.
Websites
General Websites:
And some specific topics....
Medicine
Secrets of the Dead - journey to the 14th century and learn about the plague that killed a third of the world's population, its economic and cultural impacts, and more
Women
Famous Women of the Middle Ages
Vikings
Superstitions and Witchcraft
http://www2.kenyon.edu/projects/margin/witch.htm
Games
Food
http://www.medieval-life.net/food.htm
Music
Merchants
http://www.britainexpress.com/History/Townlife.htm
Castles
http://www.pbs.org/wgbh/nova/lostempires/trebuchet/castle.html
~ Castle Life
http://www.castlewales.com/life.html
~ Life in a medieval castle
CRIME
http://www.camelotintl.com/village/crime.html