Thanks for everybody's input. I will try to explain to him. Actually I am not too worry about the result. Labeling or not won't change who he is. In contrast, I will be happy to clear my puzzle and explain his behavior/difficulty. I have been thinking of evaluation and IQ test for 2-3 years. All of my son's teachers, my friends, even my DH told me he is fine. Only me cannot ignore his writing difficulty and slightly delayed motor skills. His symptoms are mild and his giftedness masked his difficulties. Thank this board to encourage me to search help. I'll keep posting after got the result.