The problem: ADHD students may interrupt the teacher and classmates by calling out answers or commenting while others are speaking.
The reason: Children with attention deficit disorder have difficulty controlling their impulses. Scientists believe that lower levels of dopamine, a neurotransmitter in the brain, leads them to respond immediately and reflexively to their environment — whether the stimulus is a question, an idea, or a treat. That's why they often seem to act or talk before thinking, and suffer as a result.
The obstacles: Children with ADHD don't always realize that they are interrupting or that their behavior is disturbing to others. Simply telling ADDers their behavior is wrong doesn't help. Even though they know they're acting out of turn, their impulsivity overrides their self-control. Many ADHD children can't understand nonverbal reprimands, like frowning, either.