This document discusses the evolution of the web from Web 1.0 to Web 2.0 to Web 3.0 and highlights some key Web 2.0 tools like blogs, wikis, RSS feeds, social bookmarking, photo sharing, video sharing, blog search, news aggregation and mashups. It outlines educational benefits of blogs and wikis like helping students communicate, collaborate, motivate participation and provide opportunities to read and write. It also provides some tips for preparing a classroom for blogging and using wikis for collaboration.