My guest today is Eric Mazur, professor of physics and applied physics at Harvard University. He is also a creator and entrepreneur in the area of technological resources for classroom teaching. He is known for his research in ultrafast optics and condensed matter physics, and also for his extensive work in the teaching methodology known as Peer Instruction. Attending one of his lectures on teaching as a graduate student was one of the formative experiences of my professional life. He is a true pioneer in active learning in science and engineering education, and was practicing and espousing the benefits of “flipped classrooms” long before the word came into common usage.