The document discusses personal learning environments (PLEs). It defines a PLE as the collection of tools, both online and offline, that individuals use to connect, create, and share content with communities of interest to support their own personalized learning. PLEs are unique to each individual based on their choices and preferences for how and what they learn. The document provides examples of how different technologies can be used as part of a PLE for searching, filtering, storing, publishing, sharing, and communicating information.