This series of videos was produced by the John Birch Society. JBS has always stood for liberty and conservatism. However, they have been somewhat discredited by accusations of xenophobia (which I have not personally substantiated) and by their tendency to buy in to conspriacy theories (which I observed several years ago when I was more enamored with them).
This series, however, is a good and simple primer of Americanism and our form of government. I think it would be a good starting point for studies in U.S. government for middle schools, high schools, and community colleges. Notice that I said, "a good starting point". It's a good basis for thought and discussion which should expand and refine the themes.