A site that gives a lot of information on the various European societies that had revolutions around 1848. Covers the revolutions in France, Germany, Italy and others.
This site gives a good background for the beginning of European Imperialism in the 19th century which can be tied into future lessons with the unstable aspects of Africa and Asia today.
This is a database for multiple ancient civilizations. It covers societies from every continent and is accessible in an easy to use site. Anyone can view this site and find information on almost every society.