The Digital History site has many resources for teachers and students alike. They are committed to using new technologies to enhance teaching and research of American History. You can find virtual exhibits, primary sources, guides, teacher pages, interactive timeline, multimedia, and the history reference room.
Digital History is a free resource and there is no advertising on it. The site is supported by some great partnerships. Under multimedia you can find flash movies, games, and recommended websites. But my favorite is the historical music connections. There are many games that relate to specific time periods. I looked at Famous Americans the game is from the Smithsonian.