This document discusses the use of social networking and online participation among teenagers and opportunities for using these tools in education. Some key points: - 93% of US teens 12-17 use the internet and over half use social media sites like Facebook and MySpace - Teens spend significant time online participating in activities like sharing photos, commenting on others' posts, visiting video sites, blogging, and remixing online content - Educators are exploring ways to leverage these online behaviors and networks to connect students globally, promote collaboration, share resources, and get feedback on student work.