This probably does not come as much of a surprise to most Korea watchers that Korean students are very stressed out in regards to their studies:

Korean kids are the most stressed about their studies in the world, a study reveals.

A whopping 50.3 percent of Korean kids are stressed about their studies, the highest proportion among 30 countries surveyed, according to an analysis by Kim Mi-sook of the Korea Institute for Health and Social Affairs.

Relatively high stress was also recorded in Spain (49.4 percent), Slovenia (48.9 percent), and Portugal (47.2 percent). The least stressed kids were in the Netherlands (16.8 percent), Hungary (18.4 percent), Slovakia (19.1 percent), Austria (20 percent), and France (20.8 percent).

Only 18.5 percent of kids in Korea said they are “very happy” at school. Korea comes fifth from the bottom after Estonia (9.2 percent), Italy (14.8 percent), Finland (15.3 percent), and Czech Republic (17.3 percent).  [Chosun Ilbo]

You can read more at the link.