CBS Evening News | Kim Ki-Hoon earns $4 million a year teaching in a “cram school" that's part of South Korea's $17 billion after-school learning industry

Kim Ki-Hoon earns $4 million a year teaching in a “cram school" that's part of South Korea's $17 billion after-school learning industry. But while Korean students rank high for academics, they're at the bottom for happiness, and Kim is trying to change that. Seth Doane reports. Air Date: Feb 19, 2014