My suggestion to my union when surveyed was rather than a 15 per class have a max of 15 but a limit per sq meter.
I also think hiring outdoor marquees is a good idea and perhaps portable toilets. Have staff who's responsibility it is to spray etc after each child and monitor hand washing.
PPE especially face mask because let's face it kids won't always remember to social distance (my pupils don't have the concept as special school) and we need to limit the transmission as much as we can.
Split sessions. 9-12 and lunch is had at 11.30 and 12.30-3.30 and lunch is eaten at 12.30 on arrival.
Dinner staff to oversee all lunch and teachers and TAs have an hour off to eat properly and have some space away from possible transmission.
Cleaning or TAs to clean classrooms during this hour period.
Social distancing in playground must be enforced between parents dropping off. If parents dropping off are not following these rules it's an increased risk for staff. We do not want to transfer the mini epidemics to schools and when they were open there was a high amount of illness and also school staff have died due to covid.
Shielding staff to do the home learning.
Vulnerable staff to do home learning as much as possible with limited time in school.
Staff with shielding and clinically vulnerable family members again to do the majority of home learning and only attend minimally.
Education is one of the best things we can offer children. But it's not value if the risks are higher. We need to look at other things such as adopting later GCSEs for this cohort. So everyone except the current year 10's (who can take gcse later maybe July) remains same school year from September. Nothing changes with regards the year the move to juniors or secondary. I'm talking repeating the curriculum from February half term as they would have done and following on from there.