This book provides an overview of the state-of-the art of psychological research on learning and knowledge exchange with digital media, based on a comprehensive research program that was realized at the Leibniz-Institut für Wissensmedien(IWM) during the last decade. The dramatic rise of new tools and technologies, including both hardware devices like smartphones, tablets, multitouch-tables, or stereoscopic screens as well as software environments like Google, Wikipedia, Facebook, Twitter o...