There is a program called Efofex that is free to students with a diagnosis of dysgraphia. Maybe explore getting a copy and trying that out. It would require that your DS carry a computer to class. A link follows:
http://www.efofex.com/empower.php

If the sw doesn't benefit your student now, it would very likely help in the future.

BTW, my dysgraphic son's handwriting has improved some with age. He uses graph paper and a Penagain pencil, so math work is legible. He pretty much types everyting else and has done so since 5th grade. Bessings, h