For more than a decade, Dennis has been actively involved in efforts to improve K-12 science, technology, and pre-engineering education at all levels. With an academic background that includes a BS in Earth & Planetary Sciences from MIT and a Masters in Math & Science Education as a Mellon Fellow at Columbia University. Teachers College, Dennis brings together the perspectives of both science content experts and experts in research-based pedagogy. As an experienced physics teacher in both public and private schools, Dennis has emphasized Problem-Based Learning and Engineering Design Challenges, and has provided learning experiences and courses in robotics, electronics, holography, astronomy & astrophysics, computer programming, and chemistry. Dennis's experience includes joining efforts to establish exemplary new schools, to establish model curricula, and to develop standards-based tests for state-wide use. He has served on the faculties of 3 state-level, university-affiliated, math-science high schools. Dennis's current work includes dissertation research into Virtual Schooling Experiences, as a PhD student with the University of Illinois. Dennis.s work for the Center includes work on the High School Transformation Project, while also providing courses supporting professional development of teachers through the Center. Dennis also teaches courses through the Natural Sciences Department, including science content courses for pre-service teachers. Other interests over the years have included rock-climbing, cycling, spelunking, model railroading, and gardening.