Since this seems to be his only bona fide perhaps you could tell us. Or is it a secret? Or does it change from sidewalk to sidewalk as the police make him move along?
Badnarik teaches in the free market rather than in a quasi-statist/ABA-certified law school. He organizes his own classes, and sells tapes of his lectures.
Someone who took Badnarik's course told me that it was "awesome." He said that Badnarik really made the Constitution come alive, and that one left the course with a rich and in-depth understanding of the Constitution and American history.