Andrew Watts writes A Teenager’s View on Social Media
Written by an actual teen providing a different view based off of a university student's life in this highly coveted age bracket. medium 
Facebook is something we all got in middle school because it was cool but now is seen as an awkward family dinner party we can't really leave.
Instagram is by far the most used social media outlet for my age group. Although the most people are on Facebook, we actually post stuff on Instagram.
Twitter is a place to follow/be followed by a bunch of random strangers, yet still have your identity be attached to it that your employer will see one day
Snapchat is where we can really be ourselves while being attached to our social identity. Without the constant social pressure of a follower/friend counts I am not constantly having random people shoved in front of me.
Tumblr is a place to follow/be followed by a bunch of random strangers, yet not have your identity be attached to it like a secret society that everyone is in but no one talks about.
Yik Yak is a powerful contender that people actually use. But it is only as good as the 10 mile radius so it is unused whenever there is a school holiday.
Medium’s only challenge as a blogging site is becoming known to the teenage audience. The layout of the site as well as the content is all there.
Here are other social media networks that some teens use but don't require a full-length discussion.
LinkedIn — We have to get it, so we got it.
Pinterest—It’s mainly female with artsy/hipster focus.
Kik—The only time I ever hear this is for the joke.
WhatsApp—You download it when you go abroad.
GroupMe—By far the most used group messaging.
Part 2. What Teens Really Think About YouTube, Google+, Reddit and Other Social Media. medium
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Danah Boyd writes
An Old Fogey’s Analysis of a Teenager’s View on Social Media. medium