So closing schools is up to how school administrators feel? Or science?
Can you point to federal guidance/metrics on whether or not schools should be open or closed? The CDC was trying to put some out. That got quashed by Trump himself, who just screams OPEN THE SCHOOLS! So what exactly is our national policy? It certainly is far from clear. And in that lack of clarity, states set guidelines to follow. But some states put it in the hands of the localities to decide their metrics of when to open and close, and so they are off trying to create their own guidance. And the result is variance and a bit of chaos.
But you whine and wonder why there is no consistency, no clear scientific guidance - IT'S BECAUSE THE TRUMP ADMINISTRATION REFUSES TO PROVIDE IT AND ENFORCE IT.
A good, decent president would tell folks to go here, and not scream his deluded political opinions:
The vast majority of school administrators are probably going there anyway (pretty much all of them other than the deluded Trumpsters). As you can tell if you visit that page, they don't exactly provide numerical metrics to follow, just general guidance with green/yellow/red risk levels. That's nice, but, as it should, it follows
community levels of contagion. That IS probably the most appropriate metric. Most community levels of contagion seem to be above 20/100,000 these days, which according to the guidance levels here put transmission in school at moderate to high or extreme categories. From that general guidance, a school administrator seems right to me to highly consider closing down if levels are moderate or worse. But remember, it doesn't say whether they should or should not shut down, only provides coarse guidance. But you wonder why school administrators are confused, or why schools are shutting down?