They literally couldn't open the schools without air conditioning in May, June, or September, so even the bad ones have that.
As far as the other criteria, it's all trash. All of it. While I don't disagree with the premise that parents are failing their kids, I think about those that could possibly thrive if the conditions weren't so bad.
The whole teacher salary argument doesn't appeal to me. You shouldn't go into primary or secondary education if you want to get rich. Classroom size has proven to be a myth. Countries that far outpace us in education don't necessarily have smaller classes.
A modest investment in infrastructure seems like a practical one.