David Kratzer earned his master’s degree in computer science before the introduction of the personal computer. He has been involved with high performance computing and teaching computer science for many years. Kratzer works on the High Performance Consulting Team at the Los Alamos National Laboratory (LANL). He helps LANL’s scientists use supercomputers effectively. He also manages LANL's participation in the Supercomputing Challenge, a program where elementary, middle school and high school students come up with a computational science project and work on it all year long. The Challenge is both a competition and a learning community.