Have you considered sending a letter of introduction to your child's teacher? Friendly letters about your child's talents and joyfulness, along with information on ADHD and what they need for success, can go a long way to building your relationship with your child's teacher.
Here is one mother's letter as an example, Dear Teacher: Let Me Introduce My Wonderful Child at bit.ly/nrcdearteacher .
What would you like to tell your child's teacher to get the school year started off right?