Concerning re-opening of Schools
I recommend that schools can be opened at 10%
like one class per day say grade 12 attend Mondays and grade 11 Tuesdays grade 10 Wednesday and so on..The grade that attended on a day needs to occupy all classes for social distancing compliance.
If a grade attend one day a week they must be given home works for the whole week for the days they will not be attending.
Number of school hours can be reduced to maybe 5,25 hours which makes 45 minutes per subject.