This report from British Columbia is sobering, especially the writing results (always the source of the biggest gender gaps, which is a problem, considering that college work demands competent writing skills).
From the article:
...at least one trustee was deeply troubled by the male-female gap across all grades. "We're losing a whole bunch of young men," Mickey Kinakin said. "We're getting one more report of this happening and I don't see it being addressed. And it's not just the fault of the school district. It's throughout the whole education system. There's a failure of boys in the public system and there's a reticence in the public system to face that fact."