The P.A. system crackles. "Chris Duhon ... scoreboard ... Court Two."

And with that, college basketball's best freshman last year, the one who already has a national championship under his belt, hops out of the bleachers and goes to work the clock as if he were nothing but a team manager.

That's the way it is here at the adidas ABCD camp in northern New Jersey, this four-day cattle call for the best high school prospects in the nation. It doesn't matter who you were before you got here. The campers are saddled with three-digit numbers that make them look like marathon runners. And counselors like Duhon, most of them household college basketball names, do everything but mop the gym floor here at Fairleigh Dickinson University.

But if you think that's how the counselors earn their keep, you ain't seen nothing yet. Every morning, while the campers sit in classes that prep them for the mental rigors of college basketball, the counselors are going to a different type of school -- courtesy of Professor George Karl.

I got there on Monday a little after nine to witness the burly, bespectacled Bucks' coach lead his daily drills, which he has run for the last 11 years. They're designed to teach the college stars how to work at the next level (Hint: harder than they can ever imagine).

Looking like an overgrown kid himself in baggy hoop shorts, a sweater vest and a backward baseball cap, Karl runs the kids ragged with structured scrimmages and halfcourt drills.

Notre Dame's Ryan Humphrey holds his shorts. USC mates Sam Clancy and Desmon Farmer's school colors now include a sweat-drenched burgundy. Seton Hall's Andre Barrett, his arms dead, short-arms a five-footer and misses badly. Duhon mops his brow and glances at the clock, apparently longing for scoreboard duty. And you thought summer camp counselors just did bed checks.

"Of course it's gonna be hard," Karl tells me long after the counselors have limped off. "If it were Club Med, I'd let one of the assistants come out here and lead it."

But Karl's not all drill sergeant. Later in the afternoon, the coach is relaxing with a familiar counterpart -- Bucks GM Ernie Grunfeld. Karl's son Coby and Grunfeld's son Dan, both ABCD invitees, play on the Rockets -- who appear overmatched but pull out an OT win on a last-second shot. "Yesss!" Karl hisses, shaking Grunfeld's hand and announcing the Rockets' record to anyone who cares. "Two-and-one!"

Sitting nearby, Duhon is wearily watching Karl celebrate when the P.A. summons him for his scoreboard duty. Karl is still reveling in the win and doesn't notice as Duhon jogs by.

Doesn't matter. He'll see Chris soon enough.

Andy Latack covers college hoop for ESPN The Magazine. E-mail him at andrew.latack@espnmag.com.