Sure, but all the activities the OP complains about - parent teacher conferences, kindergarten/classroom tours, etc. all require the actual teachers involvement so it seems perfectly reasonable that those activities would occur during regular working hours. Plenty of schools offer before/after care for families with working parents so that they can drop-off/pick up their kids before/after work. I don't think that is an issue for anyone. But I think it is unreasonable to expect teachers at schools to work outside normal hours just for the convenience of parents with jobs who can't even take a few hours off work for things that they obviously deem important. That's an unreasonable burden to place on teachers, and in general seems like a waste of taxpayer money if they had to be paid overtime just to accommodate a small fraction of parents.

Are parent/teacher conferences not built into the schedule as working hours? If I recall correctly from my mother, who was a school teacher, they did these twice a year and those eight hours were counted as one of the days that they worked in their contract. Maybe that is not universally negotiated.

As she was a special ed teacher, she also had a whole slate of other meetings with parents to go over IEPs and testing, and if those were before 8 am or after 3 pm, she was paid an hourly rate for those meetings.

Overtime pay for IEP meetings is definitely not the norm everywhere.

It is unreasonable to work with assumption that parents don't work or penalize kids for parents (moms to be precise) working.