I would hardly classify Condi Rice as an "Uncle Tom," not even as an "Aunt Thomasina."
Conversation of 9th graders in my class a month ago:
black girl: George Bush is a racist
white boy: George Bush can't be racist, he hired Condoleeza Rice didn't he?
black girl: Condoleeza Rice is an oreo
white boy: you're an oreo
me: uhm, okay, why don't we move on to vocabulary
there are much better days than this, though
At least your students are arguing about current events.
My biology class consists of across-the-room shout-fights about whether Cassidy could take Lil' Wayne in a free-style rap battle. These are usually followed by discussions of whether Magic Johnson is "cured of AIDS" or dead.