This resource packet has six fun one-page word searches about George Washington, Abraham Lincoln, some other major U.S. Presidents (i.e. Jefferson, the Roosevelts, etc), and a handy link to them all.
The word searches are not just words in isolation but informative sentences that have the words in them. This makes for much better learning of facts. Then come:
Reading About U.S. Presidents;
Handy Video Links About U.S. Presidents;
Clip Art Of The Presidents (all the first 44);
Higher O