David Purvis, Ph.D., is a university academic and a classroom teacher dedicated to improving and energizing science teaching for children. Known as “Dr. Dave,” he has taught science to students of all ages, from elementary and middle school science classes to high school biology classes, all the way up to college science education classes. He developed and wrote the ninth-grade physics and tenth-grade chemistry curricula for the Success Academy Charter Schools in New York City and was a science consultant and teacher for the Columbia University School. He has a doctorate in microbiology. He is the author of the widely popular Dr. Dave’s Science Teaching Manuals.