I've said this a million times already but you cannot treat schoolchildren the same as shop customers. If I go into a shop I am in there for 10 minutes. Max 30 minutes if doing a "big" shop. And if I don't want to wear a mask at all I can buy online.
If I go to school I am there between 9 and 3. 6 hours is completely different to 10 minutes. I can see the value in wearing them when out and about in the corridors, but wonder whether the messing about putting them on and off would actually reduce the effectiveness, given you're not meant to touch them.
I wonder how many of you agitating for 11+ year olds to wear masks have worn face coverings in shops right through lockdown as I have, or have only started wearing them now you have to.
The rates of covid are very low now. As I've said on other threads, if we follow the rules properly now we won't have a second wave. But you have to follow the rules and not start hugging each other in a crowded pub, for example.