It figures. Just as we’re getting used to Facebook, teens are fleeing it. In fact, according to a recent survey, Facebook usage among teens has dropped a staggering 56 per cent in the third quarter of 2013. Why? They don’t want to hang with their parents and grandparents – even on a social site.

So where are they sharing photos, videos and personal information about themselves now? Here are some popular social media sites with the teen/young adult sect and why parents might want to monitor their kid’s usage on them.

Snapchat is popular among teens – to the tune of 350 million photos or “Snaps” sent every day – because it allows them to send photos that disappear within 10 seconds. Sounds safe, right? Not necessarily. While some may think this an ideal way to send pics (yes, even nudies) of themselves, all the receiver has to do is take a screenshot of the image and bam! Consider it shared.

Facebook actually owns Instagram, but this isn’t stopping teens from posting pics, following anyone they want, and adding followers to their own profile. What should be of concern to parents is that this site enables users to share the photo location – essentially allowing your child to broadcast his whereabouts to the world. What’s more, Instagram also recently rolled out the ability to send photos privately as direct messages, which means it’s  much more likely to be used to send racy or inappropriate pics.

Twitter’s video-sharing app lets users record and share 6-second videos that can be shared with the Vine community, or with all of Twitter and Facebook with one click. All Vine accounts are public unless you choose to have a protected account. Additionally, once teens download the app, they have access to all kinds of videos, including ones that are sexually explicit.