Your Teen Online
Here is the link to the article: http://www.micheleborba.com/blog/2012/03/15/parenting-cyber-kids-knowing-how-to-monitor-their-online-activity/
I don't know anyhting else about this site, so I'm not recommending it as a whole, just this article.
I would add that she doesn't even address one of the biggest issues which should be content filtering. You need to help your children, especially the young men in your home, avoid the perversion that is online by setting parental limits, making sure they can't access the internet in private and being watchful over their emails and texts. I recommend Covenant Eyes. Email me if you want more details, have questions or if BVC can help you in anyway in these regards. firstname.lastname@example.org