If there is just one thing you need to remember about information security it's this: "Data is an asset & asset = money"
This is all there is you need to know for information security. I also work on volunteering for a hacker high school project and the most important thing about security I try to teach the teenagers is this. "Data is an asset"
Usually I do it this way: I will have some coins at hand for this. Then I make a list together with the teenagers with attributes they use for registration for a so called "free" service. "If it's free then U are the product in some way or form". The problem with data is an asset is: it's abstract. Giving away information bytes is painless, easy and of no consequence in the first place. So I need to make a connection for the teenagers to remember or to link in the brain: data is an asset. Now the abstract concept of "Data is an asset" has been linked. The discussions becomes focused around: what do I get in return for the money (asset: your name) I paid for. Where is my freedom? Why do I don't get money if people are making money from my data and information (advertising). I should get paid if my information is used to make profit. I shouldn't reveal my information too easily.