This is the first time I've heard of legislature implementing particular restrictionns related to social media for teachers and students.
According to this Atlantic Wire article,a Senate bill 54 was passed by Governor Jay Nixon and states "Teachers cannot establish, maintain, or use a work-related website unless it is available to school administrators and the child's legal custodian, physical custodian, or legal guardian. Teachers also cannot have a nonwork-related website that allows exclusive access with a current or former student."
Additional details & link to the article, http://www.theatlanticwire.com/technology/2011/07/missouri-outlaws-teachers-and-students-being-facebook-friends/40626/.
