> at least for children to be too young to be left without supervision
Maybe school openings should just focus on that age group instead of being all-or-nothing? They could give extra focus to preschool & kindergarten, reallocate teachers from higher grades to decrease student-teacher ratios and help spread the infection risk thinner.
The teachers might not want to move from the "Almost definitely not going to shit themselves" grades to the "Might still shit themselves" grades. The massive change in responsibilities between grades likely means that the schools can't just reallocate teachers without negotiation.
Maybe school openings should just focus on that age group instead of being all-or-nothing? They could give extra focus to preschool & kindergarten, reallocate teachers from higher grades to decrease student-teacher ratios and help spread the infection risk thinner.