This document discusses online professional learning networks (PLNs) and their benefits. It outlines assessment standards related to online communication from levels 2 through 5. It prompts the reader to consider who is in their current PLN and how often they connect with colleagues, experts, and globally. It defines a PLN as one's entire network for exchanging learning information, increasingly online. It provides examples of tools to join or create a PLN, including Delicious, Twitter, and Diigo.