An article on the impact of the internet on teens:
http://malverne-westhempstead.patch.com/articles/hey-kid-look-over-there-its-the-internet
On teens and social media:
http://www.webmd.com/parenting/news/20110328/social-networking-may-affect-kids-health
http://www.medicalnewstoday.com/articles/220410.php
and debating whether to ‘friend’ your teen online: