I wonder how many adults are learning new things that children have to know nowadays by helping them with school work at the moment ?
Do you think what good does it do that an 8 year old knows about fronted adverbials and can spot them from a mile away? How useful is this going to be in later life?
What is the most useless / confusing thing your children is learning?
You might be enjoying finding out new Ideas and your school may be brilliant at explaining new concepts to parents and carers or you might be having to find out how to teach this yourself. There seems to be a huge disparity with school support.
So am I being unreasonable that I think there are more important concepts than for example a fronted adverbial for an 8 year old to know? Or you might even love them and think I am talking rubbish here.