Boys are graded more harshly than girls. Why?

Article here. Excerpt:

'Across all ages and nearly all areas of education, boys are under-performing girls.

“Girls are about a year ahead of boys in terms of reading ability in OECD nations, in contrast to a wafer-thin and shrinking advantage for boys in maths. Boys are 50 percent more likely than girls to fail at all three key school subjects: maths, reading, and science,” Richard Reeves, a senior fellow in Economic Studies and the Director of the Future of the Middle Class Initiative, wrote in his recent book Why the Modern Male is Struggling,

According to a 2018 Brookings Institution report, about 88% of American girls graduated high school on time, compared with 82% of boys. In 2020, six out of ten college students were women. Once on campus, they graduate at higher rates, receiving more associate’s, bachelor’s, master’s, and doctoral degrees in the process. As evidenced by declining college enrollment in the U.S., a drop for which men account for 71%, the gender disparity is continuing to worsen.'