By AMANDA RIPLEY
$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.