The document discusses how social networking tools like Facebook and Moodle can be used by educators for professional development and collaboration in the 21st century. It explains that Web 2.0 focuses on practices like sharing information and harnessing collective intelligence. Social networks promote communication among educators with similar goals. The Facebook group "e-Learning in Developing and Developed Countries" offers webinars and online courses on integrating technology for active learning. Classroom 2.0 is a Ning network that allows educators to connect, share content and resources, and participate in discussions and events online.