Many social networking sites incorporate an instant messaging feature, which means you can exchange information in real-time via a chat. This is a great feature for teachers to use to facilitate classroom discussions. A study by the John D. and Catherine T. MacArthur Foundation shows these networks can be used as effective vehicles for students to pursue self-paced online learning. In addition, the Internet is the ultimate online textbook. Students no longer need to take out six library books at a time. Much of what they need to know they can find online.