Public school teachers in an Oklahoma City district (which has spent a good chunk of taxpayer monies for the tuneful way of teaching social studies, vocabulary, and math to at-risk students) have complained about the material.
Specfically the contents of the history section which uses rap to
Take this ditty about Old Hickory: "Andrew Jackson, thinks he's a tough guy./ Killing more Indians than there are stars in the sky./ Evil wars of Florida killing the Seminoles./ Saying hello, putting Creek in the hell holes./ Like Adolf Hitler he had the final solution./ 'No, Indians, I don't want you to live here anymore.'"
Simplistic and crude. Not fair to the dude.