This is kind of a side note, but is the idea of parents checking homework new to most people? Is it something that teachers now expect parents will be doing?
I had a third grade teacher in the mid 90s (New York state) who required that a parent sign each homework assignment, or else it would be regarded as incomplete. That might have been unusually strict, but the concept of parents checking homework seemed fairly normal.
At a minimum, when children don't understand the assignment, they usually turn to their parents for help. If the parents can't understand the assignment well enough to help the children, that's a hindrance to the children learning.