This document discusses emerging technologies related to Web 2.0 and Web 3.0 and their implications for teaching and learning. It describes how Web 2.0 allows for user-generated content and sharing through sites like Flickr, YouTube, and Wikipedia. It also discusses how learning management systems are adopting some Web 2.0 features but remain largely separate. The document explores ideas around the semantic web and using structured data to enable new applications in Web 3.0.