One tip for advocating--it helps to phrase things in terms of "the child's concerns" rather than your concerns. So, if you state that your child is losing her interest in reading, is complaining about the books, is complaining about school, etc (even if it isn't exactly true), I think you'll get farther than if you state that YOU are concerned about levels, progress, etc. They can't accuse you of being a pushy hothousing parent if it is the child who is unhappy.