The document discusses building personal learning environments (PLEs) and professional learning networks (PLNs). It defines PLEs as systems that help learners manage their own learning. PLE building lays the foundations for lifelong learning by supporting self-organized learning. As learners engage more with a topic, their PLE can transition to a PLN where they connect with experts and discuss professional interests. A model is proposed for PLE building to support students in developing social networks and expanding their learning within PLNs.