Isaac’s energy level, enthusiasm, and talkativeness were too much—at least for a traditional classroom.
He had been diagnosed with attention deficit hyperactivity disorder (ADHD); one psychologist explained that he had a high IQ but low maturity.

Isaac’s energy level, enthusiasm, and talkativeness were too much—at least for a traditional classroom.
He had been diagnosed with attention deficit hyperactivity disorder (ADHD); one psychologist explained that he had a high IQ but low maturity.