This is a repost from Charlie Osborne at iGeneration. I slightly changed some of the information to make it specifically geaered towards teachers. Twitter can be a valuable tool for businesses, students, teachers and individuals alike. However, finding resources and services to realize the potential of the social networking site can be a task; especially if you’re just starting out. So, here is a directory of valuable twitter resources for teachers– from Twitter clients to lesson plans, language learning and more!