Diversifying Ruined

It is 10:30 p.m. and students at the elite Daewon prep school here are cramming in a study hall that ends a 15-hour school day. A window is propped open so the evening chill can keep them awake. One teenager studies standing upright at his desk to keep from dozing.

Kim Hyun-kyung, who has accumulated nearly perfect scores on her SATs, is multitasking to prepare for physics, chemistry and history exams.

“I can’t let myself waste even a second,” said Ms. Kim, who dreams of attending Harvard, Yale or another brand-name American college. And she has a good shot. This spring, as in previous years, all but a few of the 133 graduates from Daewon Foreign Language High School who applied to selective American universities won admission.

“Going to U.S. universities has become like a huge fad in Korean society, and the Ivy League names — Harvard, Yale, Princeton — have really struck a nerve,” said Victoria Kim, who attended Daewon and graduated from Harvard last June.

And, oh yes. Both schools suppress teenage romance as a waste of time.

“What are you doing holding hands?” a Daewon administrator scolded an adolescent couple recently, according to his aides. “You should be studying!”

“Even my worst students are great,” said Joseph Foster, a Williams College graduate who teaches writing at Daewon. “They’re professionals; if I teach them, they’ll learn it. I get e-mails at 2 a.m. I’ll respond and go to bed. When I get up, I’ll find a follow-up question mailed at 5 a.m.”

“Preparing to get to the best American universities has become something of a national obsession in Korea,” said Alexander Vershbow, the American ambassador to South Korea.

Ms. Kim developed fierce study habits early, watching her mother scold her older sister for receiving any score less than 100 on tests. Even a 98 or a 99 brought a tongue-lashing.

Their average combined SAT score was 2203 out of 2400. By comparison, the average combined score at Phillips Exeter, the New Hampshire boarding school, is 2085. Sixty-seven Daewon graduates had perfect 800 math scores.

Kim Hyun-kyung, 17, scored perfect 800s on the SAT verbal and math tests, and 790 in writing. She is scheduled to take nine Advanced Placement tests next month, in calculus, physics, chemistry, European history and five other subjects. One challenge: she has taken none of these courses. Instead, she is teaching herself in between classes at Daewon, buying and devouring textbooks.

A banner once hung on a Minjok building. “This school is a paradise for those who want to study and a hell for those who do not,” it read. But it was taken down after faculty members deemed it too harsh, said Son Eun-ju, director of counseling.