Sorry, I don't have time to read the whole thread. Apologies!!!
I'm a primary teacher and we do NOT give homework at the weekend. They get homework mon-thurs.
Children work hard enough in school, and as a parent now myself, I know how hard it is to get them to do their homework!!!
I'd maybe politely/quietly ask to see their homework policy, every school should have one. Weekends should be for families. Children should be able to relax, so should their parents!
Occasionally, I might ask mine to do something at the weekend eg practise reading a poem that I want them to recite.
Or if I'm very organised, I give them their homework on a Friday for the following week. Some children have a lot of clubs etc on and it gives them the option to do it at the weekend, IF they want.
So long as they hand it in on the right day, it's up to them how they organise it. Quite a few of my pupils like to have this option as it frees up their weeknights. They're older, though.
With my own DS, I get them to do their reading etc in the car. I ask them to spell out words, we do counting and sums, I ask them to tell me sentences etc etc.
I used to tell my younger classes to do the same eg count in 2's as you walk home, in the car, the bath etc.
I try to make it as easy as possible for parents.
Anyway, YANBU. Apologies for maybe going off at a tangent! And sorry for any typos!!!!