No matter how you do it, it will be a disaster for some kids. We are in Austria and schools were opened again in May.
We had what is probably the best scenario:
Our school is semi-private. During lockdown, fulltime online school was provided and when it eased, kids attended 50-50 and had a full schedule provided online on the other days including live classes and chat (all kids at our school have an ipad, purchased by the parents). Each class had a TA on call so the kids at home could call with questions and they could call each other on hangouts to discuss their work.
It was a total disaster for my kids. They struggled to remember instructions and without the input from the teacher they get in a live setting, were unable to focus and both fell way behind.
this isn't the school's fault. It is just that this medium doesn't work for my kids. Other kids in the class loved it and did amazingly well.
We have decided to homeschool for the next year. I am giving up my job and we will take a financial hit, but I really think that school closures and a greater reliance on distance learning is going to be the norm for this year at least and I can't watch my kids fail and totally lose their love of learning anymore.
I don't know what the answer is, but online learning will be really tough for kids who find it hard to focus or find internal motivation. Part-time school will be tough for kids who need stability and routine and full time school for all is likely to only happen for a short period of time before the T rate is too high and they have to close again or there are not enough teachers to staff them.
There are definitely no easy answers, and nobody is going to find them burying their head in the sand.