One of the great things about being a teacher is that you get to teach people things, and so when I show Marshall Curry's fantastic documentary Street Fight to my students it is ostensibly to teach them about politics, but the actual reason I show the film is so that when Cory Booker's campaign manager compares Sharpe James to former D.C. mayor Marion Barry, I get to pause the film and explain to my students about Marion Barry: who he was, what he did, and how-- despite what he did-- he got elected again (and it's a great excuse to say "crack cocaine" in class, which is always a crowd pleaser among the high school seniors . . . and I must warn you, if you're one of those people who like to watch movies in silence, with no pauses or interruptions, then you should NOT take my class, because I consider showing a movie in class more of a performance art: you are seeing a movie with Dave, who might pause it at any time to comment, or might not even bother to pause it . . . it's the educational version of Mystery Science Theater 3000, without the robots).