M.P.
My 11 yo granddaughter was diagnosed with ADHD last year. She's on medication which helps a lot. She also has and IEP, Individual Education Plan that provides her with a tutor in reading and math areas in which she is behind because of her ADHD. She's doing well with this plan.
My grandson is speech delayed and also has ADHD. He's on medication and going to a special school so that he gets the personal attention he needs.
You can get help thru the school district's special education program. The help can be anywhere from a special school to individual help in specific areas while in a regular classroom. This program does assist the mentally challenged but also assists children with issues other than intelligence that have a negative impact on learning.
Call the school district's main office and ask for special ed office number.
Here is a site that give basic info on special education. http://www.understandingspecialeducation.com/