Teenagers are less into Facebook and more into Twitter these days, according to a new report from the Pew Internet & American Life project. The study finds that teens are also more and more public with their social media interactions. But the most active kids are also the most capable with privacy settings — something that mystifies a lot of us.

Mary Madden, senior researcher at the Pew Internet & American Life project, joins Marketplace Tech host Ben Johnson with the details.

See what high schoolers have to say about Facebook (it’s for homework), Gchat (not cool), Snapchat selfies (everybody does it), and more here.