This is off the Teaching Tolerance website, and it recaps Mix It Up Day during a lunch period. Mix It Up Day is dedicated to giving students an open opportunity to interact with other students that they never had interacted with within their own school walls.
An interesting activity put together by the NY Times that allows people to make certain choices in order to close the budget gaps that currently exist. Great for an economics class.
This website is an immense interactive map of the Eastern front during WWII. It is filled with chronological events, primary documents, pictures, interview, and many other resources.
I have used this link in one of my classes at the University.
It includes documentation of every slave voyage (from where it left and where it was headed), how many slaves were on the voyage, and from where they were from.
It contains maps, graphs, etc., and is very interactive.