@Coolcatteacher share this K12online Web 2.0 booklet stating that classroom's considered Web 2.0 are held up by 6 pillars: Internet Safety, Information Literacy, Internet Citizenship, Internet Teamwork, Intentional Internet Activities, and an engaged teacher.
Have students create an "avatar" to represent them w/o using their actual picture. Great options for collaborating online or building web resources sharing projects and/or class work.