This document discusses using blogs to share audio and video files for knowledge construction. It introduces uploading media to blogs and sharing blogs through RSS feeds and subscriptions. Students can subscribe to classmate blogs to receive and discuss updated media posts. While the existing campus video server and LMS are limited, blogs encourage contribution, sharing and collaboration through features like comments. This helps create opportunities for knowledge building through discussion of shared media. The document provides examples of using blogs and Google Reader to subscribe to media posts and receive automatic updates.