Heather Mac Donald: The persistent claims of gender bias are ideological, not empirical

Here are some charts that will cause the progressives to lose their minds. 

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The big question: are there biological / chromosomal reasons for the difference? 

That’s assuming you can even ask that question when progressives can’t tell the difference between XX and XY. 

Or is there a push in the government schools to ensure women hate math and never go into STEM fields, so they are incompetent at doing well on the math portion of the SAT?