Another one here.
In primary our son was having such difficulty with the mechanical process of writing that it was obviously having a major impact on his confidence. I took him to see a rather eccentric person who specialises in getting intractable cases (GPs etc
) to write to a tolerable standard and she got him writing quite an elegant (if very old fashioned) script at a good speed, which eliminated the psychological hang-ups he'd developed. In Y4 his writing was by far the nicest in his class imho! Since then it's deteriorated gradually and is very messy and not very legible. It gets commented on in reports sometimes but the SENCO (or whatever it's called this week) has tested him and found nothing that merits action. But that needs to be your first step: if the school has a problem with his writing it's up to them to have the first shot at dealing with it.
I got a slight improvement from ours by changing his pen to something differently shaped that I thought might suit his grip better, you could try watching him write and see whether you think a different pen would help.
I would guess that your son needs to write more slowly if he's to write more neatly. You could try encouraging him to PLAN what he's going to write (if only it was that easy!
), rather than making it up as he goes along and trying to write at the speed he's thinking. If that makes sense. There's a rather good book on mind mapping (tony Buzan, Mind Mapping for Kids) which might help with that. I'm not a fan of mind mapping and can't be bothered to plough through a whole book on the subject, but this one was about at the level of my attention span and was imho probably the least annoying of all his books.
Typing is always thrown in as though it was some sort of panacea for writing problems but few people can type at anything remotely like the speed they can write, or with anything like the accuracy. Personally I wouldn't go anywhere near typing as an alternative without doing a reputable touch typing course and being really serious about it.