Dalwil,
Do you have a letter from his previous school recommending a skip? My son got one of these and it helped ease the way. In areas like this, educators listen to other educators better than to pretty much anyone else, from what I've seen.
If he had mastered the first grade curriculum, would they write a letter saying so? If they send an official thing saying that he's finished first grade, the public school might have no choice but to let him go to 2nd grade. This might be your best bet.
Failing that, have you tried use the Iowa Acceleration Scale Manual? You can get the 2002 edition on half.com for less than $40. The new 2009 version costs more. A local library might have it or be able to get it from another library for you.
Val
