The Wall Street Journal recently told the story of Kim Ki-hoon, a South Korean “rock-star” teacher who rakes in an eye-popping $4 million annually to tutor kids after school. This exorbitant salary is made possible by a performance-based system that rewards instructors who command the highest demand among pupils.And demand is high in South Korea, hands-down one of the most education-obsessed countries on the planet. Welcome to the world of South Korean’s hagwons – a system of school-after-school . (source The Diplomat)