It’s gotta be a case by case. A school may be in a hot spot area. It would be worse to open to then have to close again...at what point do you eject? What is the exit strategy if it flairs up? Etc.
On a teachers salary it might be hard to sign many up.
That is why this is a local decision by the Governor, Mayors, County School Boards and Districts to decide based on their resources available and actual cases in their area.
Our school system has a detailed plan where parents chose either virtual or hybrid. both plans were laid out with how they will work. Cleaning and health guidelines were discussed in several town hall virtual meetings. The principal of the school held a Q&A and got feed back from teachers and parents. They are reviewing plans for cleaning, class changes and already separated desks in classes. Lunch room rules have been changed. Crowded hallways have been minimized significantly. IT etc is being worked on to ensure no breakdowns. Plans are being discussed for what happens when a kid tests positive, when 50 kids test positive etc.. I give them a lot of credit for all the work they put in the last4 weeks after "school" ended in June. But this is local politics and leaders in action the way it should be on this subject in conjunction with state health officials and CDC guidelines (not Trump's ass gut feeling).
Trump should stay out of it and not order any schools to do anything because there are thousands of school districts from hot spots to never touched spots and each has to work within their own framework. DeVos and trump shoud keep their hands out of it except to promise federal aid to those areas affected that need to adapt with partial virtual or hybrid scenerios.