[orwin]

Not my experience tbh. It could be cultural differences, but parents disengage because they don't know how to help their children w/o creating tensions and/or without neglecting the rest of their life. If the teacher provides a cheap way (low time investment) for parents to have a view on what's done in the classroom and what their children are supposed to know, they usually embrace it, from what I've seen.

There is some cases where yes, the parents shouldn't have had kids, and disengage because they don't care. I do not believe this is the majority (my friend teach in middle school, but the technique cale from a high school teacher BTW).