Thanks for the links to the data. I wanted to see if they broke it out by state, but I don't think they did.
I did notice many of the top countries have this fun footnote, "National Defined Population covers less than 90 percent of National Target Population (but at least 74 percent)". Which probably translates to they didn't measure the worst performing kids which likely gooses the numbers pretty decently...
The U.S. has this one, "Met guidelines for sample participation rates only after replacement schools were included." Which means some schools declined to participate so they had to ask others.
I did notice many of the top countries have this fun footnote, "National Defined Population covers less than 90 percent of National Target Population (but at least 74 percent)". Which probably translates to they didn't measure the worst performing kids which likely gooses the numbers pretty decently...
The U.S. has this one, "Met guidelines for sample participation rates only after replacement schools were included." Which means some schools declined to participate so they had to ask others.