This document provides an introduction to Web 2.0 applications and how they can be used for educational purposes. It discusses key concepts of Web 2.0 like open source, community learning, blogging, tagging and podcasting. Several examples of Web 2.0 tools are given, including Google products like iGoogle and SketchUp, Ning for social networking, Twitter for microblogging, and YouTube for sharing videos. The document encourages educators to explore these tools and find ways to incorporate collaborative and engaging Web 2.0 activities into their classrooms.