I haven't participated in this discussion and haven't read all of the posts, but I wanted to ask if you think that there will a lot of parents who will be reluctant about sending their children back to school this fall? I've noticed a plethora of commercials and other advertising for various home-schooling programs that makes me wonder if more families will opt for educating children at home. I've checked websites for several local school districts, and so far, no one has announced an opening date for the 2020-2021 academic year. In these parts, school generally starts in late August or right after Labor Day. I'm sure there a many decisions that will have to be made with regard to when students will return to school, what precautions and procedures will be implemented to keep students, teachers, and staff safe, etc.
I think that well-informed and reasonable parents will not send their kids to school. They'll do whatever it takes to at least wait and see what happens.
More desperate, less educated parents will send their kids back if the schools are open. This means that the essential workers' kids and kids from families where there is greater risk of COVid will be in the classroom.
Here in California, we have two patterns (not uncommon in other states): year round school and schools that start in August. Almost no schools wait until after Labor Day, although this year, they certainly should.
The precautions have already been set forward by the CDC and by independent researchers. But school districts don't own or have the budget to buy PPE or Hepa filters or to do any of the other things suggested (including lower class size).
I think some people think a teacher can actually be in a real world class and teach kids at home at the same time (but that is nearly impossible). The real world teachers are encouraged or required to spend the first month or so of school teaching the kids how not to infect each other, supervising new kinds of recess activities and of course, staggered arrival and lunch schedules. IOW, the schools themselves will not be functioning as normal, it will be relatively chaotic and when employees or kids get CoVid, most districts will shut the school down for cleaning (as if that's the main problem) for at least 2 days.
So education will be intermittent and work will be disrupted for those parents who do need schools as childcare.
Almost no schools are considering a truly hybrid situation (where the non-attending half of the students are required to be online at home). There are tremendous difficulties in getting various kids in one family online at the same time.
What is clear: some states and districts are about to run uncontrolled experiments on children of all ages. Really, 10 and unders are at fairly low risk (although I would never send my child).
High school students are going to transmit CoVid asymptomatically to their teachers, each other and to their broader families. They need to stay home (they also do much better than younger students at online learning).