Paul Andersen teaches science at Bozeman High School in Bozeman, Montana. He is the 2011 Montana Teacher of the Year. He has been teaching science on YouTube for the last three years. Paul began his career teaching all the science classes at a small rural school in northern Montana. Andersen uses technology and game mechanics to increase engagement in his classroom. He discusses here how he modified his methods for grading, delivering instruction and planning based on the principles of game design.