J.Z.
Hi Celia -
Sometimes, especially for the gifted children that seem to have lack of focus it is because of the way that they think -- it is difficult for them to parse out the details, and in following it makes it difficult to organize themselves and their work.
My son is 10 and he was diagnosed at 3 as high functioning autistic, although he is a pretty typical kid. One of his biggest challenges is organizing himself and his work which makes it difficult to write, plan math problems, etc.
Our school district has been OK with helping us with this, but nt sensational. One thing I have found helpful is a form of OT (Occupational Therapy) that will work with him to better develop these planning skills. The other thing that may be true for your son is that they are visual learners -- so it is important for them to see the plan.
Since these are issues that effect your sons ability to excel in school, you have every right to request an IEP (Individualized Education Plan) and see if after an evaluation if they will provide these OT services.
If, they wont provide an evaluation or you are not happy with theirs, get an independent evaluation from an educational psychologist or a facility that works with children with learning disabilities can direct you to the right professional in your area.
If, after an independent evaluation, they conclusively find there is some issue, then they are required to provide services.
Hope that helps a little.
Please feel free to contact me if you have any other questions.
J.