Personal Learning Environments (PLEs) do exactly what they say on the can – they are personal to each individual, created by them, owned by them, used by them within their lifelong learning. In these two articles, Prof. Steve Wheeler explains PLE’s main concepts:
The Anatomy of a PLE: http://steve-wheeler.blogspot.com/2010/07/anatomy-of-ple.html
The Physiology of a PLE: http://steve-wheeler.blogspot.com/2010/07/physiology-of-ple.html