[another-one-off]

I fully support the teachers doing this, but the response by employers is more likely to be to lower the workload than anything else.

The only effective (read: doesn't cost anything to execute) strategy employers have to calibrate how much workload can be achieved in a given time is to keep increasing the amount of work until people start quitting or jobs go undone, then scale back a little bit. There are other strategies that cost more to execute or require enlightened management; but they aren't the norm in my experience.

All a teacher can really do for a class is either 1:1 time with an individual or N:1 time with a group. All the details of exactly what gets done only obscures the fact that there is always going to be a good outcome for students if the teacher puts in another half-hour of unpaid work and that teachers shouldn't do that because it is unpaid.