The document discusses various aspects of online professional learning communities for teachers, including how they help with networking, provide opportunities for experiential learning using different tools and platforms, and help build teaching skills and confidence. It also outlines different synchronous and asynchronous communication channels that can be used, such as blogs, wikis, forums and video conferencing. Specific online communities mentioned include Tapped In and the National Writing Project. Quotes from members discuss the benefits of being part of a collective with diverse views that can provide quick feedback and insights.