Singapore tops all three.
American students are faring poorly compared to their international peers in math, science and reading, according to the 2015 Program for International Student Assessment (PISA) study.
The U.S. was below the international average in math and about average in science and reading. Singapore was the top performer in all three subjects on the PISA test, reported the Associated Press.
More than half a million 15-year-old students in about 70 nations and educational systems took part in the 2015 exam. The test is coordinated by the Paris-based Organization for Economic Cooperation and Development.
The PISA test is conducted every three years. Schools in each country are randomly selected, and OECD says the selection of schools and students is kept as inclusive as possible so that student samples are drawn from a broad range of backgrounds and abilities. The test is based on a 1,000-point scale.
Among the findings: in math, the U.S. average score was 470, below the international average of 490. Average scores ranged from 564 in Singapore to 328 in the Dominican Republic.
In science, the U.S. average score was 496, about the same as the international average of 493. Average scores ranged from 556 in Singapore to 332 in the Dominican Republic.
In reading, the U.S. average score was 497, around the same as the international average of 493. Average scores ranged from 535 in Singapore to 347 in Lebanon.
Average scores in math have been on the decline since 2009, and scores in reading and science have been flat during that same time period. Across the globe, American students were outperformed by their counterparts in 36 countries in math; 18 countries in science and 14 countries in reading.