Web 1.0 focused on publishing information for readers. Web 2.0 enables users to read, write, share, collaborate and create online through tools like Google Docs, Sites, Groups, and more. Web 3.0, also called the Semantic Web, aims to make online information more interconnected through metadata and data integration to enable personalization and adaptive experiences. The document discusses how Web 2.0 tools like Google Apps, Blogger, VoiceThread, and Google Earth can enhance student engagement and collaboration in courses. Examples of student projects using these tools are also provided.