Hi
i have had good success with fitball programs. starting in prone, walking out onto the hands only as far as they can stabilise, with tummy or pelvis still on the ball (or use a peanut roll if they are really weak) and doing a combination of timed static holds and walk-out/walk-in (with hands) reps/sets. Really concentrating on quality of the position and movement as they are doing it. The further they can progress out from the ball, the more they work on core stability.....better sitting stability for fine motor tasks. Make sure fitball is kid size. This may not be appropriate for the school setting unless they have time set aside for intervention. Otherwise, great home program if parent can be shown exactly what is requried.