Art Guy,
Will your DD complete worksheets that are actually at her level? If you gave her a fourth grade worksheet, would she be able (and willing) to do it?
If she can and will do the more interesting work, she might have ADD, which can make it very difficult to impossible to pay attention to work that does not "capture" and stimulate her attention, or she could just be bored to tears and even insulted that she is being asked to prove that she knows such babyish material in her class.
If she can't do worksheets that are interesting and at her level, there may be something else going on in addition.
Work and instruction at the intellectual challenge level is actually an accommodation for ADHD, and, oddly enough, is also the appropriate intervention for a gifted child who is demonstrating educational disengagement due to underchallenge.
HTH
