DS7's teachers explicitly told parents not to help with homework, not even if the kids don't understand the assignment. (If they don't understand it, they should go to the teacher and get clarification so that the teacher can get feedback about how the assignment is written.)

The teachers also provide feedback to the student on the homework if they are expecting to see something that he isn't providing. So that's not exactly grading but it's what I would expect at this age.