Data on how teens prefer to communicate:

http://www.prdaily.com/mediarelations/Articles/How_teenagers_communicate_7_things_you_should_know_10601.aspx

An article about Danah Boyd, a widely respected figure in social media research:

http://www.nytimes.com/2012/01/22/fashion/danah-boyd-cracking-teenagers-online-codes.html?_r=1

An article on the complexity of parent/teen interaction on facebook:

http://www.usatoday.com/tech/news/story/2012-01-22/facebook-parents-teens/52743092/1?csp=34news

and some tips for connecting with your teen:

http://millburn.patch.com/articles/great-tips-for