Adam Geller is the author of “Evidence of Practice: Playbook for Video-Powered Professional Learning” and founder of Edthena, a developer of video-enabled educator professional learning tools. He started his career in education as a science teacher in St. Louis, Missouri. Since 2011, Adam has overseen the evolution of Edthena from paper-based prototypes into research-informed and patented platforms used by schools, districts, teacher training programs, and professional development providers. Adam has written on education technology topics for various publications including Education Week, Forbes, and edSurge, and he has been an invited speaker about education technology and teacher training for conferences at home and abroad.