Call me naive and unsophisticated if you will but that sounds like a learning disability to me! Hoist them on their own petards for all you are worth

He has an appointment for ADHD screening this week. It's been in his medical record from the age of 3 as highly suspect. The thing is, when he is properly engaged he is perfectly fine. He never is though. His teacher hands him mass amounts of work to do on his own, he finishes it quickly, then becomes bored. He hates listening to addition problems other kids have issues with when he is doing long division at home for fun. Right now I am teaching him multiplication and division of fractions. He has a blast and will do them for hours.