Twitter has been demonized by the press. Visit Understanding Twitter to learn more about this powerful tool that allows us to participate in conversations synchronously and asynchronously with people all over the world.
Twitter can be used as a teaching tool. This article helped me understand some of the ways in which I can use Twitter in my classroom: http://blogs.kqed.org/mindshift/2011/07/28-creative-ideas-for-teaching-with-twitter/
Use Twitter to find articles that describe how you can Teach with Twitter. Share some of these great links here and describe some of the developmentally appropriate ways in which you plan on using this powerful tool for teaching.