Shanghai ranked first in math , reading and science among 15- and 16-year - olds . East Asian economies perform better than other economies in all three categories . The United States ranks below average for the 65 countries assessed . Test scores have stalled or deteriorated in most countries .
Shanghai ranks first in math , reading and science among 15- and 16-year-olds . East Asian economies performed better than other regions in all three subjects . The United States ranks below average for the 65 countries assessed . Math scores have stalled or deteriorated in most countries .