Students with attention-deficit hyperactivity disorder (ADHD) often exhibit non-compliance that presents a significant management problem for classroom teachers. Student behavior management training programs suggest that reducing repetitions of commands improves student compliance. To examine this claim, 86 teachers of ADHD students between the ages of 5 and 10 were randomized into treatment and control groups. Barkley's procedure for reducing repetitions was administered in the treatment group. Repeated-measures ANOVA revealed that children in the treatment group exhibited a significant reduction in non-compliance (p [is less than] 0.002), while children in the control group did not. These results suggest that Barkley's technique is effective and should be recommended to teachers of ADHD children.