The explanation that I’ve seen floated is behavioral. Boys are active and physical and don’t focus as easily as girls, who are more amenable to sitting quietly and paying attention. The idea is that the current predominant K12 style favors students in the latter behavior group.

I have two kids in K12 and I don’t think it’s that simple. Not that I have a good explanation of my own, mind you.

>who are more amenable to sitting quietly and paying attention

Is this explanation not making a blatant assumption here that girls are statistically less hyperactive and distracted than boys?