I assume it will be for secondary schools. Where I live in the US our school guidelines are as follows (we are all fully masked by law outdoors)- all kids above age 8 will be masked. All teachers will be masked. There will be mask free zones in each school and students will be encouraged to sit there socially distanced and read/play/colour multiple times a day. To be fair our kids have been masked for nearly 5 months now so it’s somewhat second nature to them.
For kids under 8 the CDC guidance was that because they keep fiddling with their masks they don’t need to wear it in school.
My 3 year old will have to be masked on the way to school (he’s been doing summer camp anyway) and then he takes it off at the door, we self certify that everyone is healthy, he washes his hand at the door and he’s handed over to his teacher. We are not allowed inside classes and they will be outdoors as much as possible (this is not feasible for long as New England gets v cold- although up to -12 Celsius they normally play outside in snow gear).