Sympathy - I've been fortunate in not having such experiences (at least not with educators!) myself, but they seem very common. I think you could hope that once the principal has met your DD himself, or at least talked to people he trusts who have, his attitude may be very different. I have read teachers saying that it really is true that vast numbers of parents with averageish kids think their child is gifted, so it's natural that they get jaded and don't believe it. (I know, the testing and the letter should have been enough, but maybe he's not good with statistics...) Good teachers and principals, though, will be prepared to recognise the truly exceptional children! Good luck.