Media playback is unsupported on your device

'I study hard to achieve my dream'

2 December 2013 Last updated at 18:23 GMT

The results of the international school tests - known as Pisa tests - have been published by the OECD.

In previous years, South Korea has been one of the highest achievers - but it means long hours of study for the country's pupils.

Between waking up at 6.30am and getting home at 11pm, 16-year-old Hye-Min Park spends most of each day devoted to study.

As well as normal school, she attends a private cramming session or hagwon, followed by more self-study in the evening.

Hye-Min spoke to BBC News about why she is prepared to take on such a punishing schedule.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.