alt Hacker NewsThe U.S. scores are interesting. On page 28, look at the column that says "Share of top performers" (in science, reading or mathematics): https://www.oecd.org/content/dam/oecd/en/publications/report....
The U.S. is at 17.8% top performers, well behind Japan and Korea but around the same as Canada and Switzerland. But the U.S. is significantly ahead of the big EU countries: Germany is at 14%, France is at 9.8%, Italy is at 10.1% and Spain is at 7%.
> The U.S. scores are interesting.
Unfortunately, those scores are not reliable. It is a recurring problem with the USA for the PISA studies.
The preliminary chapter explains why data has lower confidence is some places. For the USA, there were many problems, including political reluctance in some states or schools, that lead to uncontrolled biases. Notably, the ratio of unreachable children is 40 %, twice more than their upper limit for valid results.