This document provides an introduction to Web 2.0 tools that can enhance online learning. It discusses technologies like Ajax, wikis, blogs, RSS feeds, and social bookmarking/tagging that allow for more dynamic and interactive content. Specific Web 2.0 tools are also highlighted, such as Google Docs, Flickr, YouTube, and social media/bookmarking sites. The goal is to illustrate how these new technologies can engage students and support collaboration in online learning environments.