Children with apraxia can also have ADD/ADHD. Children with ADD/ADHD can have a variety of speech and or language issues.
Children and Adults with Attention Deficit/Hyperactivity Disorder. Large informational website from the National nonprofit organization CHADD
What is ADHD?
Large collection of articles on all aspects of ADHD from Ldonline
ADHD and Speech Development
From the American Speech Language Hearing Association (ASHA). Inattention, hyperactivity, and impulsivity have their effects on speech and language.