https://hechingerreport.org/u-s-now-ran ... ions-math/
U.S. now ranks near the bottom among 35 industrialized nations in math
Math performance of American 15-year-olds declined significantly on international PISA test
The PISA test is administered every three years around the world to measure what 15-year-old students know in math, reading and science before the end of compulsory schooling. In the United States, it’s primarily taken by 10th graders. The U.S. has never been a strong performer globally, but has generally scored near the average since the test began in 2000. In 2012 math scores deteriorated a few points. Now, with the 2015 results in, it’s a clear downward trend.
Andreas Schleicher, director for education and skills at the OECD, which administers the PISA exam, said that math has always been the most difficult subject for American students. Even students in Massachusetts, one of the top performing states in the nation, do no better than average globally, Schleicher noted.