Abstract: The TPACK framework has received a lot of attention lately. For the most part, it has been seen as a form of teacher-knowledge residing within the head of individual teachers. Teaching with technology, however, is a complex task and often requires that teachers tap both social (other people) and cognitive tools (artifacts) successful. In this paper, we challenge the idea of TPACK being resident in just one individual and suggest that in some contexts it may be valuable to consider the idea of distributed TPACK. According to this approach TPACK may be conceptualized as being distributed across individuals (teachers, technologists, students) and artifacts (websites, lesson plans, books, software etc.). We build our argument based on, (a) distributed cognition theory; (b) revisiting prior research; and (c) evidence from two large-scale technology-based educational projects initiated by the Politecnico di Milano. We end with recommendations for future research and practice.