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I wonder if there is any data anywhere showing which states have the best performance in math/reading.

PSAT statistics probably come closest to this, because there is no superscoring or anything to muddy the waters.

Take a look at what the "cut" scores are-- but unfortunately, they aren't parsed into verbal versus math-- it's a composite value.


Still--- if you look at just Massachusetts and Mississippi, you can see that there is quite a spread of expectations and performance by the time kids reach high school.

Schrödinger's cat walks into a bar. And doesn't.