>You could increase per teacher productivity by running 12 months of school per year

Productivity is output divided by some input, either labor or money. Working for longer isn't going to magically increase productivity.

>Covid showed distance learning doesn't work for most kids. So you can't eliminate real estate costs or hire educators in low cost areas. Computerized education doesn't seem to work, either.

Right, I don't have a specific solution for increasing teacher productivity, but it's not obvious that it's a law of economics that it can't increase. People thought lawyers and doctors couldn't be automated away, then came chatgpt.

> People thought lawyers and doctors couldn't be automated away, then came chatgpt.

Form contracts and will generators and what not was automation for lawyers. Plenty of enter symptoms to get a diagnosis stuff out there for doctors; or the more paletable, enter symptoms for charting, get a suggestion and enter medicines and get alerts about interactions.