Click on the graph for a look at the numbers of unemployed from the 1940's through today. This graph could be a great way to get your students thinking about business cycles and the frequency of recessions in the United States. This graph, andmanyothers, can be found at the St. Louis Federal Reserve Bank's excellent website.
If you need a graph related to pretty much any macro related concept the chances are pretty good that the Fed has just what you are looking for. The more you expose your students to charts and graphs the better off they will be come EOCT time.