This document discusses personal learning environments (PLEs), personal learning networks (PLNs), and professional learning networks (PLNs). It addresses how PLEs allow learners to manage their own learning goals and processes. PLEs can then develop into PLNs through connecting with others, and eventually into PfLNs through connecting with professionals. A model is presented showing the progression from PLE building to forming a professional learning network. The roles of social networks in supporting these learning networks is also discussed.