Students from the United States posted mostly average scores on the 2012 Program for International Student Assessment, a study comparing math, reading and science proficiency of 15-year-olds from 65 countries and economies. Here is how U.S. students compared to a selection of the top performers on the test. Read related story.

Sources: Organization for Economic Cooperation and Development (2013), PISA 2012 Results: What Students Know and Can Do = Student Performance in Mathematics, Reading and Science (Volume I), PISA, OECD Publishing. | Cristina Rivero/The Washington Post December 3, 2013
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