I think those are good suggestions - but be prepared to do this for all the parents!! Not only do parents not have anything to compare their children's work with, they frequently do not have sight of their own child's schoolwork either, so they are worrying at home in a complete vacuum. Does this mother get to see her own child's school work in any meaningful way? Parents have different approaches to the lack of information ranging from "oh well what will be will be", through to "let's assume school is a disaster and do everything at home, and then if later on we find out that school was great that's a plus point." I trained years ago, and taught secondary. At that point these above expectations, below expectations phrases were not popular. I have to say that receiving such a phrase as a parent would do nothing for me. And if a school told me my child was average and they were doing well to achieve above average it would concern me.