Looking at the graphs when I got the report to load they look pretty constant to me. No obvious change from 2003 to 2018 that I could see. Which makes me wonder what they’re testing for when 3/4 of the kids in the states fail…. Is this stuff like set theory and geometry or is it basic math and simple algebra (word problems) or what? Any pointers to a sample test?

Any chance this is conflated with lousy reading skills as all testing relies on that.