This document introduces Web 2.0 tools that support 21st century skills like communication, collaboration, problem solving, creativity and innovation. It lists popular Web 2.0 sites for creating, publishing, sharing and collaborating like Wikipedia, YouTube, Flickr and Facebook. It then provides examples of Web 2.0 tools that can be used for problem solving, decision making, and creativity including Webspiration, Delicious, and VoiceThread. Finally, it includes resources and references for using Web 2.0 tools in education.