This document discusses the use of online tools to support effective professional development for educators. It outlines several principles of effective professional development, such as being intensive, ongoing, focused on student learning and curriculum. It then describes different types of online tools like course management, voice/content, collaboration, and communication tools that can help implement these principles. Examples of tools discussed include blogs, social bookmarking, and learning management systems. The document concludes that online professional development, if done well, can help address issues like extending training over time and building learning communities.