South Korean students are among the best in the world, according to PISA. They’re also the world’s least happy school children reports Quartz.
Economic growth rates are high in South Korea. So are suicide rates. Some blame the intense academic pressure.
High math scores correlate –somewhat — with unhappiness, notes Derek Thompson in The Atlantic. Those happy Indonesians score near the bottom in math. (Qataris are depressed and bad in math, however.)