Teen girls experience a lot of hate online. While parents and teachers try to address these problems from outside girl culture, teens have been coming up with their own social media solutions.
Author Nancy Jo Sales says the Internet fosters a kind of sexism that is harmful to teen girls. Her new book is American Girls: Social Media and the Secret Lives of Teenagers.
The announcement comes just weeks after a woman sued Twitter, saying the platform knowingly let ISIS use the network "to spread propaganda, raise money and attract recruits."
The social media app allows users to post anonymous comments visible to others in the same area. It's become a breeding ground for racial and violent threats, and some colleges may ban the app.
Greggor Ilagan, a Hawaii politician running for higher office, used Tinder to reach potential voters. Now, says NPR's Scott Simon, Ilagan is taking a more traditional approach: walking door to door.