Wow that is great to hear! I would suggest that DD ask teachers for previous year's examples of A, B and C work.
Rubrics are wonderful also.
It's a real issue. There is also the issue of 'plotting the curve' of feeling of self judgement. For example, I'm in the process of writing my thoughts down for a handout. This morning I felt like it was terrible and a really bad idea. Now I'm feeling so glad I stuck with it. I knew at the time that with any 'art-like' project I always go through these emotional stages.
Gifted kids need peers so they can have a reliable reference group.
Best Wishes,
Grinity
