I LOVE this activity, because it doesn't seclude social media only to outside the classroom. It allows for parents to be included on what goes outside the classroom at their leisure. Definitely will be using this in the future!
Not free, but for those girls interested in science these are great Apps, problem solving whilst having fund rescuing Robots etc. If they are going to be on the computer, better it be science I reckon.
5 Minutes to a Kid-Proof iPhone & iPad - "hidden secrets" to simply ensure your kids don't delete your apps or contacts or make purchases on your iPhone or iPad! And also a trick to limit their access once within an app!