A.A.
My oldest son (14) was diagnosed when he was 12. We did not medicate him until he was 13. It has made a huge difference! Not only has his grades improved, but he is also no longer an angry child, but back to his sweet self. Granted he still has his days, but I chalk that up to being a teenager!
I knew that my son had ADD/ADHD since he was 3. But I could not get a doctor to diagnose him. Both my brothers have ADHD so I knew what the signs were. Doctors kept telling me I was just trying to medicate him for no reason, that he was just being a boy. His grades suffered tremendously because of it. He became angry and distant. I still sometimes feel like I did not fight hard enough to get him the help he needed when he was younger. I wish I could change that. But he is doing a lot better now.