An Obama guest, Lin-Manuel Miranda, pushes the envelope on gangsta rap, and history teaching:
You can’t use that in the classroom, teachers? Why not?
Wikipedia notes of Miranda:
He is working on a hip-hop album based upon the life of Alexander Hamilton, entitled The Hamilton Mixtape. He recently performed “The Hamilton Mixtape” at the White House Evening of Poetry, Music, and the Spoken Word on May 12, 2009. Accompanied by Alex Lacamoire.