DD's occupational therapist did it for us. She did a great job, too - she talked about how she had recommended a book for DD that she usually recommends to teenagers, because I had told her how high DD's reading level was (she was nine at the time). The very next session, DD had obtained the book, read the whole thing, filled out most of the quizzes, and wanted to discuss specific issues related to her reading. I don't know how much the letter mattered, since DD had qualifying IQ and achievement scores, but it was a solid nomination.