What else do we know that we learned from songs? Aside from the fact that the tune is an old English drinking song, the National Anthem recounts the story of the Bombardment of Fort McHenry during the war of 1812.
Is there anyone who doesn't know about the Edmund Fitzgerald?
Music is a great enhancement to learning.
By the way, the whole of the schoolhouse Rock series can be purchased on DVD for use in the classroom. The collectors edition, which I have, comes with a songbook and the story behind the song. You'd be surprised that not only will you remember the song but it will also stimulate your memories. Where you were when you first heard it. Who you were with. Etc.
P.S. Its amazing that the people who claim to be "defending the Constitution" have forgotten the preamble, especially where it says "Promote the General Welfare and secure the blessings of Liberty, to ourselves and our posterity". But that's another thread entirely.