The website, Designs for Democracy Is an amazing tool for any American History or Government course. This site shows useful graphics, from hull design of ships, to boot innovations. There is even a design for a card including some of the founding fathers. (And you thought the monetizing of political figures is a new idea... Silly goose.)
Classroom integration can be very interesting for this site. The focus is on Democracy and it's development, which does not just include political action, but also private action. Without the private sector supporting democratic ideals, the government could have never gained traction.
Overall, this is a great site for use with middle to high school students, and I'm sure even lower grades could benefit.