Personal Learning Environments (PLEs) are a new approach to learning that recognizes learning as a lifelong process that takes place in different contexts. PLEs allow learners to organize their own learning using whatever tools and devices they choose, including social software like blogs, wikis, and social networks. PLEs have the potential to support lifelong competence development and recognize informal learning. They are learner-driven and based on the idea that learning is not provided by a single institution. PLEs may challenge traditional education systems by distributing learning across networks and giving more control to learners.