It seems driven what the local government is doing which (at least in US) is going to be dictated by how much federally funded relief money they can get.

In some states it will take a legislative act to cancel school and/or significant funding and training to go all-digital. Public schools are there legally for all and they need to have solutions for all - inclusive of poorer people that don't have internet/computers.

Once there are reliable tests and ability to test for residue (computer geek here, forgive my ignorance on biology) that someone had the virus then I would imagine more things return to normal-ish. From what I'm reading, this does look like a multi-month adventure.