Stephen J. Reynolds received a B.A. from the University of Texas at El Paso, and an M.S. and a Ph.D. in geosciences from the University of Arizona. Dr. Reynolds is a professor in the School of Earth and Space Exploration at Arizona State University, where he has taught regional geology, earth resources, evolution of landscapes, field studies, and teaching methods. He has directed the geologic framework and mapping program of the Arizona Geological Survey, completing a new Geologic Map of Arizona. As a National Association of Geoscience Teachers distinguished speaker, he has traveled across the country presenting talks and workshops on how to infuse active learning and inquiry into large introductory geology classes. He is a commonly invited speaker to national workshops and symposia on active learning, visualization, and teaching. Dr. Reynolds is the author of the highly successful Exploring Geology.