This is an article I read on the TODAY website:
The start of the school year is a great incentive to remain (or get) relevant, or at least keep virtual tabs on your teens. You may use Facebook, Twitter, and Instagram, but guess what? The social media sites you understand are not the half of it.
According to a 2013 Pew Internet study, teens are sharing more information than ever. This spring tech news outlets reported that while teenagers are still active in the social media their parents know, they are increasingly seeking privacy and perceived anonymity on other sites.