specifically primary and secondary school, although university is an issue as well
i put this in a comment but:
i think the school issue is difficult. if you go back to school, you will have massive increases in cases and deaths. if you go online only, you put enormous pressure on parents - schools are responsible for feeding many children and often act as daycare. if you do a “hybrid” approach you’ll get the worst of both worlds, except it’ll likely be primarily lower-income children going to school and getting sick, plus more pressure on teachers.
It's a really hard question because the social safety net in the US is ass and we rely too heavily on the school system to fill our gaps. Personally, as someone who grew up in an abusive household, I think a lot about the kids who no longer have anywhere safe in their lives.