That's the big question isn't it.  You think you know your kids and what they're up to but you might change your mind after reading this...According to a recent survey of 12- to 17-year-olds from the National Center on Addiction and Substance Abuse at Columbia University:

- 17% percent of high schoolers  are use alcohol, smoke cigarettes or do drugs during school hours.

- Around half of the students polled said they know who deals drugs at school, and where students go during the day to get high.

- Marijuana was the drug easiest to buy on school grounds, students said, followed by prescription drugs, cocaine and ecstasy.

- The kids said that seeing pictures on Facebook or MySpace of their pals partying made them want to get drunk or stoned themselves.  Yikes!

It sounds to me like kids need less facebook and more one on one time with their parents.  Your kids may complain at first, but they'll thank you in the long run.