I plan to use Twitter within my introductory world history class this fall. My plan is to make it an optional enrichment channel for students. I will use it initially for sharing links to interesting, relevant articles on the web related to the current history topic in class. Later in the term I may use it as an informal feedback loop for class activities. Following is an interesting article from the Chronicle on using Twitter.  A Framework for Teaching with Twitter - ProfHacker - The Chronicle of Higher Education Excellent conceptual article on the possibioities for teaching with Twitter. Especially helpful is the matrix box that explores the levels of interactivity by students and the depth of the content. Highly recommended. (tags: Twitter instructional_technology teaching_and_learning backchannel_communication)