My son's tester commented he had correct answer outside of the scorable time - significant considering my son's issue is verrrrrrrry slooooooooooooow processing speed from ADHD. However, the tester was either unable or unwilling to put that statement in writing. I wrote the letter that I included.
It sounds like you have both similar pieces of information for your son. You have evidence of dysgraphia and you have a teacher who sees his true abilities. Perhaps a writing sample in which he had his accomodations in place would round out the application.
Best of luck to you. I'm curious to see how it turns out.
