American parents (still) prefer boys—and it's hurting their daughters' test scores

The math gender gap may be narrowing, thanks to STEM programs, advocacy and an overdue backlash against inequality. But there's still a lot we don't know about why girls historically haven't achieved better. Norms around women's rights and roles in society play a part, but when girls are devalued, precisely how does that create gender differences in math performance?

* This article was originally published here