The document discusses various Web 2.0 tools that can be used for History Day projects, including their target audiences and time commitments. It outlines social networking sites like Facebook and MySpace, blogging platforms, shared office tools from Google, photo sharing sites, bookmarking, survey tools, video hosts YouTube and TeacherTube, Twitter, and CafePress. Most require only a few hours a week or month for engagement but creating original videos is very time intensive. The tools allow sharing documents, photos, videos and research without large files or storage limits.