To the more than 600 million members of Facebook and the expanding legions of Twitter users, one can add a growing number of schools and districts. Whether communicating with parents and the public, enhancing classroom instruction and staff development, or rallying school spirit, administrators and teachers are beginning to leverage the interactive and multimedia features of social networks that have the added advantage of being widely and easily accessible--and free. And while some district leaders have banned the use of social networking sites altogether because of fears over inappropriate use and/or goofing off among students, others are puzzling over what to do about the brave new world of social media, and weighing its potential use by students and teachers inside and outside of the classroom.