The aim of the Kolegea project (Cooperative learning and mobile communities for in-service training in general medicine) is the development, implementation and evaluation of a training concept and a supportive, Web2.0-based system for collaborative learning in professional social networks (communities) in the training of medical specialists. KOLEGEA is specifically aimed at doctors in training as a specialist in general medicine. Your advances training is characterized by medical activities in various professional and not locally networked medical facilities and general practices, which considerably restricts a part-time knowledge sharing and collaborative learning in peer communities.