are you sure?
only, i do poke dd2 and ds1 occasionally (or more than occasionally, if they are daydreaming) to get their attention and get them back on task (ds1 has major issues with distractibility) and i have been known for all three of my children to tell them that in no way is their work neat enough and that they are capable of doing much better.
ds1 is as yet un-dx (but has ishoos), and dd2 has cerebral palsy. (her work can be shocking)
they are all capable of producing neatish work, and i won't have them slacking or being lazy if i think they can do better. and i expect the school staff to have a good grasp of their capabilities and to pull them up on it if they aren't meeting their potential. i'm fed up with TAs who say 'bless' and have low expectations just because they have additional needs.
i don't think i'd be racing to school. i'd be asking them if they weren't paying attention, and if their work was neat enough?
and then i'd saying, well, you'd better pay attention and do it neater next time, eh? 
what does the ot say about ds's capabilities?
have school implented decent supports? (pencil grips/ writing slope/ decent seating etc?)