How many children know what they want to spend their lives on at the age of 15? Hell, how many even know that by the time they are 30, and haven't just been caught in the cycle of working to pay off school/house/car/medical loans and bills, for a career they were encouraged to pursue? Reading here at /., it seems that telling people to fuck off and letting the kid live and be a kid, would have been healthier for some of the posters.
Personally, I wish I didn't screw off so much in HS (or played football, then half of my teachers may have acknowledged me), and would have learned chemistry and math. So many of my interests now as an adult require good math as a foundation to proceed further. It didn't help either that I had no one in my life who was either not too busy, or unable to articulate why these subjects are important.
I'm 34 today, and back in school. Finally making the effort to learn algebra, so I may continue on and take courses in chemistry and geology, for my own personal interest. I can finally see worlds of my interests coming into reach, I have never been happier in my life. Please don't take those opportunities from kids in school today.