First off, girls are way more mature than boys in their mid teen years. So, I would expect them to have better focus in the high school years. And, better grades as a result.
Next, allow me to stir the hornet’s nest …
So much of school has shifted from logic and reasoning to feeling and emotions … which tends to favor women
Too much focus on subjects like diversity and inclusion or sustainability as opposed to the real sciences and calculus and classical literature. American history has morphed into some dystopic Howard Zinn horror show that tells kids that our nation is mean and unfair.
For the record, I think that there is no difference in IQ between men and women … but based on my experiences, women will do better at the verbal side of the SAT and men will do better on the math side. And, the current educational track is leaning towards the verbal side, where even science has been brought down to the emotional side.