Hi Simpson - it sounds like you have made a good start with the OT support and getting school involved and "up to speed"
To save you reading back, and trying to pice together our story..... I have EDS hypermobile type, and so does my ds (aged 8, nearly 9), I have two dd's neither is affected, although both have heart murmours, dd2, having a pulminary stenosis from birth, this is almost certainly unconnected and will not prove to be an issue for either of them....they are certainly asymptomatic on the whole, barring dd2's dodging periferal circulation.
My ds is profoundly affected by eds, he has pronouced hypermobility in his major joints - spine, hips and shoulders, as well as his knees, fingers and toes. He has a history of dislocations and subluxations, including his cervical spine. He suffers from urinary and sometimes bowel incontinece, poor coordination, gross motor skills development, handwriting etc. He struggles to sit still, as he is needing to constantly adjust his body for pain. He takes pain killers regularly, and has daily physio (oops haven't done any yet this holiday
), he has a one to one TA, funded by the pct, who is there to do physio, gross motor skills development, hydrotherapy and support with writing, pain relief and emotional support. He almost certainly has neurally mediated hypotension, having a fast pulse rate, and sweating profusely, and being prone to fainting or feeling dizzy, but his rheumatologist is rubbish so we do not have a proper dx. He has been affected with weight gain, becoming very thin indeed, he has severe pain in his feet and toes, as yet undx and is in the process of having Orthotics made to support him.
The bits provided by orthotics which have made the difference for ds are the vaious spints or braces, fingers, knees and neck. We use a warm compress which is helpful, he has a wobbly cushion for home and school, writing slant and foot rest, thick pencils, use of a computer where PDSS are supporting him with touch typing.
The professionals he has involved are two rheumatologists, a paediatrician, an orthopaedic surgeon, physio and clinical psychologist.
Wow sorry that is a bit or a major post, but I thought when I started writing it might be helpful to know which people are involved for ds and how......sorry 
Physio physio physio all the way for ds, that has been the most helpful, and of course his lovely TA who helps me to implement everything.