Finland fell hard in the latest rankings. Here is a more recent article from the Economist:
http://www.economist.com/news/international/21591195-fall-former-nordic-education-star-latest-pisa-tests-focusing-interest
Finn-ished
The fall of a former Nordic education star in the latest PISA tests is focusing interest on the tougher Asian model instead
Dec 7th 2013 | From the print edition
WHEN the first Programme for International Student Assessment (PISA) tests to focus on maths results were published a decade ago, Finland’s blue-cross flag fluttered near the top of the rankings. Its pupils excelled at numeracy, and topped the table in science and reading. Education reformers found the prospect of non-selective, high-achieving and low-stress education bewitching.
Every three years since then, 15-year-olds have sat PISA tests in maths, reading and science. In 2012 fully 500,000 heads were bent over desks for the exam in 65 countries or cities. The results, published on December 3rd, doled out a large helping of humble pie to Europe’s former champion. Finland has fallen by 22 points on its 2009 result, with smaller falls (12 points and 9) in reading and science. “The golden days are over,” lamented the Finnbay news website.
None of this should have come as a surprise. Finland’s maths performance has been tailing off since 2006. But it is worsening faster than in other countries with falling scores such as Canada and Denmark. The Asian high-fliers (Shanghai, Hong Kong and Singapore) have consolidated their position at the top. Much soul-searching is under way in Helsinki.