On Monday, 10 August 2020 13:02:15 UTC+1, Andy Burns wrote:
There seem to be calls for all pupils and staff to be tested weekly, as
far as I can make out that's about 12 million tests per week, compared
to just over 13 million total covid tests since the epedemic started ...

Not if they pool the blood.

One test per class? Only do more if positive.

No idea how realistic that is, but it has been discussed quite widely and, I believe, used in some scenarios.