Here is your chance to talk about it, these discussions are permitted on HN. How do we know it's really happening and what can we do about it? Let me throw out a few takes to stir things up.
- Maybe girls are naturally better at sitting still, and have always had an advantage in learning spelling and times tables that was not revealed until recently because the system was biased against them.
- Maybe a change in amounts of permitted physical activity has negatively impacted the ability to focus in anyone with a natural propensity to exercise, showing up in hyperactive kids and of course anyone with a lot of testosterone... or prenatal testosterone exposure, or whatever makes boys more likely to run around the playground hitting each other with sticks (I'm not an endocrinologist if you can't tell), in their systems.
- Maybe all we accomplished in the 1980s was replacing sexism type A with sexism type B.
- Maybe the performance gap is due to some kind of measurement error, like not comparing the performance of boys and girls at the same task. Maybe boys, due to (I'm just making stuff up here) being pushed towards math and science even if they don't want to do it, end up in more difficult classes and get lower grades in spite of equal ability.
The only thing I really know is that there's not an IQ difference between genders and the innate capacity of both groups, preferences, attention span, etc. notwithstanding, is about equal.