However, these teens have hours of course work left this afternoon - along with sand shots, drives and reading putts.
They are enrolled in the International Junior Golf Academy, a facility that blends college preparatory courses with intensive, high-level golf instruction from former pro golfers. Not that there's much choice but to practice and train; the mainland is a half-hour ferry ride away through the Calibogue Sound.
'It might sound like Alcatraz, but it's not that,' said Charlie Hoyle, a 17-year-old student from England in his second year at the academy.
The school was founded in 1995 by Brooklynite Ray Travaglione, who grew up playing and caddying on city courses such as Dyker Beach. He had a successful career on Wall Street before sinking much of his savings into the longheld dream of a golf school. How much did he have to invest? 'Let's just say it took everything I had at one point,' he said.
Travaglione modeled the school after the success of tennis academies, such as Nick Bollettieri's, which has developed Grand Slam winners including Andre Agassi and Maria Sharapova.
Travaglione liked nearby Hilton Head Island, one of the country's top golf locations and home of the PGA Tour's MCI Classic at Harbour Town Golf Links. So began the slow, time-consuming process of convincing parents to send their children to an island off the coast of South Carolina to become scratch golfers.
'At the time it was fairly innovative, fairly risky,' Travaglione said.
He says he started with a handful of teens whose parents 'believed the story.' By the school's fifth year, the academy had earned a viable reputation of combining academics with golf - not necessarily to scorch the PGA or LPGA tours, but to earn golf scholarships to college.
A year ago, Gary Gilchrist, a former professional who taught rising stars Michelle Wie and Paula Creamer at the David Leadbetter Golf Academy, became the IJGA's golf director.
Gilchrist liked the focus on the total person: helping to train a student's mind as well as their swings. 'The thing is it's so exciting to do this,' he says.
There are about 125 students from 24 states and 16 countries. Full-time students are housed in guest cottages along Daufuskie Island's shore. They attend class at the Heritage Academy, then work on their golf for three hours each afternoon.
Along with stance and grip, come lessons on health and life.
Sports psychologist Stephen Russo helps the teens on mental issues such as blocking out distractions and making smart choices. 'Some of you have been here two or three years,' he tells about three dozen students, 'and you've gotten tremendously better.'
That's been the case for Hoyle, who has lowered his handicap from an 11 to a 3 during his time at the academy. 'It's just a really good sort of atmosphere,' said Hoyle, who hopes to earn a golf scholarship to college.
All the tools to improve are on the island. The teaching staff includes former pros, including Hugh Royer III, who spent several years on the PGA Tour. Royer says if someplace like the academy existed when he was a teen, 'I wouldn't be here, I would be a multimillionaire playing on tour.'
The students disperse to two island courses after classes. There are instruction weeks to work on technique and style and competition weeks as students prepare for events on the International Junior Golf Tour, in which academy students play tournaments at Harbour Town and the Tournament Players Club at Sawgrass.
Gilchrist showed one group the proper backswing, while Royer worked with another group by the putting green. 'Come on, concentrate people,' he called as teenage minds wandered.
Ana Johnson, 17, of Oconomowoc, Wis., is in her second year at IJGA. She says she would like to design courses or take part in the industry some other way.
Her game, though, might force her to think again. Shooting over 100 on her high school golf team, Johnson has brought that down to the high 70s here.
She likes the secluded spot to train and study but admits the academy 'was a lot of sacrifice because I gave up a normal life.'
There are supervised outings to malls and movies. 'We do things like paintball,' Hoyle said.
Ben Lasso, 16, of Falls Church, Va., thinks the students mesh well since they share same goal of improvement. Lasso has brought his high handicap down to a 3 in his two years at the school. 'This is a great place to be since golf is everything I do or want to do,' he said.
The academy is not for everyone. A full-year's tuition is $34,000, and the seclusion does not suit everyone, Gilchrist says.
'I think personally, it has been a sacrifice,' Lasso said. 'But to me it's worth it.'
Students have accepted scholarships from college powers such as Georgia, Purdue and Clemson. Johnson, a senior, says she's discussed scholarships with golf coaches at Virginia, North Carolina and William & Mary.
'That's certainly part of our mission,' Travaglione said.
Its scope could be growing. The academy is building a practice facility and dorm space for 200 students on the island. Travaglione says he's in negotiations on a West Coast satellite school and to bring other instruction in baseball or soccer to his campus.