My two sons are adopted and both (although not biologically related) struggle with ADHD. My oldest also has an anxiety disorder and my youngest is bipolar and has a lot of sensory processing issues.

My youngest son who is 6 has had the benefit of a lot of OT therapies over the last few years because of his sensory issues and he has very nice handwriting (they've worked on this with him a lot).

My oldest who is currently in 3rd grade has struggled with neat handwriting since he started writing. He forms his letters backwards (he physically writes them backwards - from the bottom up) and we have brought this up to his first and second grade teachers who said it was fine. His 3rd grade teacher is FABULOUS and VERY SUPPORTIVE and recently mentioned to me that perhaps OT would be a good option to help  improve his handwriting. With the positive results we've seen with his brother we are all for it but thought it would be good to ask if anyone else out there has found it to be helpful or if they have any suggestions...