This document discusses personal learning networks (PLNs) for teachers. It notes that PLNs have become important due to a gap between how teachers learned and how they now teach, as well as a need to stay current. PLNs allow for informal, free, and independent learning. The document provides examples of how teachers can use social media like Twitter and blogs to engage in discussions, share thoughts, and connect globally as part of developing their PLN. It emphasizes that PLNs take time and effort to maintain but provide benefits like engaging students and keeping parents informed.