While you may be dealing with multiple diagnosis I do know that children with ADHD often struggle to learn to read due to difficulty with working memory. Deficits in fine motor skills (which is typical for ADHD) and sequential processing can also cause difficulty with writing. ADHD is executive dysfunction. This is at the root of the diagnosis. Some children with ADHD are able to get over the hump with early reading skills and turn out to be very good readers. However, difficulty with writing tends to persist because it is a process that depends heavily on executive processes. If your daughter truly has ADHD she will always have sub average executive functioning. Luckily, her high ability will help her compensate in many areas.
