@parasaurolophus already addressed it but this really didn't have anything to do with the schools.
And yet large universities are opening up. Different population I know but 35,000 college kids certainly have the ability to act like 7 year olds on occasion.
My daughter is a 3rd grade teacher. She is willing and able to go back to school, problem is, the schools haven't put forth any kind of plan yet to get the kids back other than we are bringing them back. Be nice if they got some input from the teachers on the challenges they are going to deal with as most of you have already mentioned. Older kids should be good but the younger ones are going to be tough. School is talking about no recess, eating at your desk, social distancing between desks (which they physically can't do with the class size, too many kids, too small a room), and the whole mask thing.