Go?
Are there really college courses on this game?
Here's an interesting note on some symbolism of the game:
http://en.wikipedia.org/wiki/Go_(game)#Life_and_death
Contemplate this on The Tree of Woe.
I believe she was in a course on game theory. They show her in the same class on two different occasions. In the previous scene the professor is creating an outcome table.
I think it's interesting enough to note that these two short scenes seem to be the only time she's ever shown in class, and both times she's not paying attention. The first she takes a call and talks loudly on her cell and leaves making even more noise, the second time she's trying out her camera. And it's the same class both times. She is also never shown studying outside of class. This might be her only class and she's not at all taking it seriously. Giving her the title of "college student" as loosely as one could apply it. There's only 3 other times we see her even on campus in very short clips, first going into her one class and picking up the newspaper where she finds the ad for the job, and the two other times making phone calls about work. Really driving home the point that she isn't trying to earn money to pay for her education, she's taking a class for the hell of it.