As a returning student and future teacher (within 2 years), Social networking in one way or another is already part of most school systems that can afford enough computers. My teacher education program consists of a large group of students advancing at once, and facebook is the best way to communicate as a group with each other. The difference is that between teachers and students, the communication must be set up such that all contact is open to parents and supervisors to view. Facebook is not ideal for this purpose, but other dedicated social sites are around for this purpose and students do benefit educationally due to more access to teachers (for educational purposes only, obviously).