First, it allows teachers to step off the stage and start listening and conversing instead of just lecturing. Second, the teacher can encourage students to discover for themselves, and learn a process of discovery and critical thinking instead of just memorizing the teacher’s information. Third, the teacher can encourage students to collaborate among themselves and with others outside the school. Finally, the teacher can tailor the style of education to their students’ individual learning styles.

Searching. As the archive of links shared by Twitter users grows, the value of searching for information via your extended social network will start to rival Google's approach to the search.

Put those three elements together — social networks, live searching and link-sharing

There are some hopeful signs. President Obama recognizes that we urgently need to invest the money and energy to take those schools and best practices that are working from islands of excellence to a new national norm. But we need to do it with the sense of urgency and follow-through that the economic and moral stakes demand.