You're dying on a very strange hill. Yes, children that have active and engaged parents have an advantage over those who do not. "Cheating" implies that the parents are doing the homework for the child without the child's involvement. Of course, that's not what is happening, and I'm sure you know that.

I'm sure you also know that not all school districts, teachers, and children are equal. Some are funded better than others, some are better trained than others, and some learn in different ways than others. If my child is struggling for one reason or another, I am going to be engaged in several ways. First, I may speak to the school and/or the teacher to understand the details. Second, I may speak to my child about their assignments and offer to explain unclear concepts to them. I won't take a pencil and start solving the problems for them.

> You're dying on a very strange hill.

Please don’t do that here.

> children that have active and engaged parents have an advantage over those who do not.

You’re not answering my questions, or responding to my summary. Either teachers are aware of this – in which case teachers should logically help the parents, not arbitrarily assigning homework to kids – or teachers are unaware, in which case parents helping kids is skewing teachers’ perceptions of the kids’ abilities – i.e. cheating. I made the charitable assumption that teachers are acting reasonably based on what they know.

> I won't take a pencil and start solving the problems for them.

But this is what the stereotypical, commonly depicted, behavior is. It may not be universal, but I am sure it is not uncommon.