The document discusses how Dave Powers created an online presentation about Web 2.0 for teachers using various Apple tools like Keynote and an iPod. The presentation defines Web 2.0 as web applications that allow users to be both readers and writers by publishing content online through sites like YouTube, blogs, wikis and forums. It discusses how this has impacted classrooms and schools by making users both readers and producers of online content. The presentation provides examples of helpful Web 2.0 tools for teachers like blogs, RSS readers, and sites for publishing presentations and videos.