My DS8 was diagnosed first with DCD and then with ADHD - there is apparently quite a lot of kids with both. DS also struggles with coloring and art class - I expect it's hard, and not very engaging, therefore he has trouble focusing on the task. Therefore he is slow at it, which increases the frustration...
His writing is also very slow - he does much better typing his answers on a computer. We are in the process of having the school get him his own Chromebook.
If DS has to do handwriting, I often scribe for him if it's more than a few words. Maybe ask your DS's teachers if that would be OK for homework?
