You need as much wide-ranging academic evidence as possible.http://www.elevenplusexams.co.uk/appeal ... cation#b11
You don't need all seven years! More recent evidence will be of most interest.
However, it might be worth including KS1 results, as level 3s at the end of year 2 can be an early indicator of GS potential.
Medical evidence at the very least should include a letter from the GP confirming all the medical facts
. (Letters that simply say "Mrs. CardyMow tells me that ......" probably aren't worth having!)
Also, as he hasn't been at school much in Y6 this half term, due to illness, would evidence of secure level 5/6 work from Y5 be admissible as evidence of academic ability?
It's also possible to submit evidence nearer the time of the appeal (probably up to a fortnight or so beforehand, although the exact time scale would need to be confirmed.)http://www.elevenplusexams.co.uk/appeals/general#a7
There are other factors, relating to a fairly recent private matter, that have noticeably affected his emotional well being, that started in August, but I would prefer not to post them publicly. They have been well documented, though. Would that hold any bearing on it?
Possibly. The best evidence would be if the school could confirm that he was noticeably affected - but if he hasn't been in school very much, that might not be possible.
CRGS is the only option possible due to a number of factors.
It is usually important to state some good reasons for wanting a place.
Do you think that ....... he would have a good case?
It sounds to me as if you might have a good case, but it doesn't matter what I think!
The only opinion that counts is that of the particular panel hearing the case.
It's also important to understand that all sorts of factors might affect the outcome, some of which could be completely outside your control.http://www.elevenplusexams.co.uk/appeal ... school#c20