I'm currently a fifth year PhD student in the Group in Logic and the Methodology of Science at UC Berkeley.
In Fall 2009, I was a GSI for Math 32. Discussion webpage is http://math.berkeley.edu/~kelty/Fall09Math32.html
In Spring 2010, I was a GSI for Math 53. Discussion webpage is http://math.berkeley.edu/~kelty/Sp10Math53.html
In Fall 2010, I was a GSI for Math 32. Discussion webpage is here
In Spring 2011 I was a GSI for Math 32. Discussion webpage is here.
In Fall 2011 I was a GSI for Math 128A. Discussion webpage is here.