Based on the International Education Scorecard for Performance in Math, Science and Reading

1) China.
2) Korea.
3) Japan.
4) The Netherlands.
5) Canada.
6) Germany.
7) Denmark.
8) United Kingdom.
9) United States.
10) Sweden.

Ratings in 2012 by the OECD for the Program of International Student Assessment.

Source: Financial Times, August 27, 2014
Photo by Rex Pe