Adam Geller is the founder of Edthena, a video-powered professional learning platform, and author of professional development book Evidence of Practice. He started his career as a science teacher in St. Louis, Missouri. Since 2011, Adam has seen Edthena evolve from a paper-based prototype into a research-informed and patented platform used by schools, districts, teacher training programs, and professional development providers around the world. To learn more about Edthena, visit www.edthena.com.