The $4 million teacher — from online.wsj.com by Amanda Ripley
South Korea’s students rank among the best in the world, and its top teachers can make a fortune. Can the U.S. learn from this academic superpower?

Excerpt:

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SeongJoon Cho for The Wall Street Journal
Kim Ki-Hoon, who teaches in a private after-school academy,
earns most of his money from students who watch his lectures online.
‘The harder I work, the more I make,’ he says. ‘I like that.’

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Kim Ki-hoon earns $4 million a year in South Korea, where he is known as a rock-star teacher—a combination of words not typically heard in the rest of the world. Mr. Kim has been teaching for over 20 years, all of them in the country’s private, after-school tutoring academies, known as hagwons. Unlike most teachers across the globe, he is paid according to the demand for his skills—and he is in high demand.