can help you deliver the rewards mentioned by American Adcademy of Pediatrics

"Parent training in behavior therapy and classroom behavior interventions have successfully changed the behavior of children with ADHD. .. Behavior therapy then involves providing rewards for demonstrating the desired behavior (eg, positive reinforcement)"

AMERICAN ACADEMY OF PEDIATRICS (September 9, 2006) Subcommittee on Attention-Deficit/Hyperactivity Disorder Committee on Quality Improvement Clinical Practice Guideline: Treatment of the School-Aged Child With Attention-Deficit/Hyperactivity Disorder

There is so much evidence that a system like works.