In my first two semesters of graduate school at the University of Arizona (FALL 2006 and SPRING 2007), I taught Math 110 (College Algebra). In my third semester (FALL 2007), I taught Math 120 (Precalculus). In my fourth semester (SPRING 2008), I taught Math 113 (Elements of Calculus). Next (SUMMER 2008), I ran the 523A-B qual prep sessions. In my third year (FALL 2008 - SPRING 2009), I had a VIGRE fellowship which allowed me to finish all non-thesis requirements, during which time I was the super TA for the core graduate algebra sequence (MATH 511A-B). Next (SUMMER 2009), I taught Math 215 (Linear Algebra) and ran the 511A-B qual prep sessions. At the beginning of my fourth year (FALL 2009), I taught Math 105 (Math in Modern Society) and served again as the super TA for Math 511A. After that (SPRING 2010), I had a research assistantship, but I continued to be the super TA for Math 511B.
In the academic year (FALL 2010 - SPRING 2011), I was a G-TEAMS Fellow working in Rincon High School (co-teaching Stats, Calc, PreCalc) to bring creative and socially/environmentally responsible teaching tools into the classroom; the program as a whole was an effort to marry the passion of mathematicians with need for improving math education in the US on the K-12 levels. I kept a journal of classroom activities (including both successes and failures) via The Rincon Blog; I spent a lot of time and energy putting The Rincon Blog together, so please take a look and enjoy. It contains projects, links, media, and many interesting facts. Feel free to use the materials in your own classrooms as you see fit (I only ask that you give proper credit/references).