I've only been the parent to a teenager for a few years, but I was a teenager from ages 13 through 25, so I think I've got a pretty good handle on teens and teenage behaviour. Sure, teenagers today face a unique and different set of challenges than we the previous generation did, but that's how it goes. We didn't have to worry about Facebook pictures and cell phone privacy issues, but our kids don't have to worry about their parents picking up the extension line on the rumpus room rotary phone and over-hearing our plans to totally ditch third period science to stand in a line-up for Def Leppard concert tickets. Kids nowadays can do that shit online.
I just said "nowadays," so maybe I should just move on to my larger point. Or maybe I should just avoid using words entirely, so here's a handy infographic for you. If your kids aren't yet teenagers, maybe print it out for future references, but print it out now because when your daughter is 11 years old she is going to use all of your printer ink on One Direction iron-on transfers.