COVID-19 Outbreak Information Updates (Reboot) [over 150.000,000 US cases (est.), 6,422,520 US hospitilizations, 1,148,691 US deaths.]

I agree. It's almost a distraction and time-waster to quibble over spacing when the fact is the air is not exchanged, just circulated over and over in that one little room all day long. Add in the A/C which reduces humidity and no or ill-fitting masks and you've got the perfect recipe for transmission.
I"m in an office all day, with people of questionable hygiene.. they're better lately, but still... We have colds sweep through here all the time.

So far.. not a one. Just some allergies.

Not sure how many classrooms have windows they can open, but if parents work with their kids to wear masks... I'm not quite freaking out. The issue is you really can't have a band class, unless you're always outside. Sports are probably out of the question. It's still a lost season for the kids.

And the areas of the country that have strong mask usage, already have kids doing this mostly well... would do the best in school. The places that aren't doing it well, you're asking for trouble in schools. So, that's probably why we see this a bit differently.