> the U.S. has a much wider range of students taking most tests.
Citation? All countries have a mix of wealthy, educated students, working class students, students whose parents are drug addicts, immigrants who don't speak the local language, etc. In my experience the US isn't that different from other wealthy countries I've lived in.
SAT isn't really used for international comparison; a system like PISA does cross-sectional studies of countries, not elites. The results are not encouraging for the USA:
Citation? All countries have a mix of wealthy, educated students, working class students, students whose parents are drug addicts, immigrants who don't speak the local language, etc. In my experience the US isn't that different from other wealthy countries I've lived in.
SAT isn't really used for international comparison; a system like PISA does cross-sectional studies of countries, not elites. The results are not encouraging for the USA:
https://en.wikipedia.org/wiki/Programme_for_International_St...
https://nces.ed.gov/surveys/pisa/
http://www.oecd.org/pisa/