Be sure to check C-SPAN Classroom (http://www.c-spanclassroom.org/). It's a great resource with a lot of lesson plan ideas, free giveaways (be sure to get the American Presidents Timeline poster), and other helpful information. It's also free.
This is perfect. I am in the same boat! Do any of you use diigo? I'm going to try to build a group just for government resources. Thanks.
You should check out youthleadership.net - it has tons of lesson plans and is associated with the University of Virginia. Also if you are interested in discussing court cases www.streetlaw.org is a good site.