The document discusses the use of blogs in English language teaching. It defines what a blog is and explains how blogs represent Web 2.0 technologies that allow users to generate and share information. The document provides examples of blogs being used as electronic classbooks, student platforms, and to inform students and provide course materials. It also describes how to create a blog using WordPress and how to share files online using Box.net and embed them in blogs. Finally, it discusses customizing blog designs and provides an example of revised classroom rules for a blended learning environment.