The real statistics.
Americans of Japanese ancestry outscore Japanese. Americans of Chinese ancestry outscore Chinese. Americans of Swedish ancestry outscore Swedes.
The only group for which this is not true are Finns. Americans of Finnish ancestry score slightly lower than Finns in Finland.
That's interesting !
It’s also true that the top half of American students compete well with the top half of students from other countries. The bottom half of American students, however, are abysmally poor. People tend to look at the overall average which does not tell the whole story.
concur - I take every country comparison on ed with a grain of salt as the measurements are not always equivalent. It is not mandatory that all kids in Japan and China go to high school for example. Often the tests aren’t administered in non-prep trade schools, etc...