Elementary Grades appropriate
Classroom Connections: This website that explains to students how the U.S. Constitution came to be. Teaching 4th Grade social studies, I want my 9 year old students to understand what they are learning about and specifically the hard work our forefathers put into our government. This is a great site to do that.
It also gives a section titled "show what you know" to give students a chance to review what they learned.
This site also gives more information on governmental social studies topics.