The results for this year's PISA international survey are in, and look who came out on top:



The survey, called the Programme for International Assessment (PISA), is organized by the Organization for Economic Cooperation and Development (OECD). It's done every three years to assess the competencies of 15-year-olds from 65 countries in key subject areas like reading, science, and math (which is considered a key indicator for post-secondary success). Here's an example of the kind of questions you'll find in the test.



That looks... hard. Boys scored higher than girls in math in 37 out of the 65 countries (56%). And there was a strong correlation between a higher GDP per capita and successful performance. For a thorough overview of the results, head over to The Guardian.