This physics course was designed to expose teachers of introductory physics, from novice to experienced, to effective tools for teaching physics at the high school level. Course participants learned (or re-learned) basic concepts, including Newton’s laws, motion, momentum, and energy. The course allowed them to become more competent and engaging teachers by familiarizing themselves with the historical development of these concepts, and with the physics education research literature about ways to teach the concepts effectively. They learned to employ research-based methods to help their students succeed in physics. The course was offered on edX in 2015.