Six boys, aged 9 to 12, attended a tutoring class focusing on reading for 30 minutes each morning. Six, 10-day treatment periods were imposed that used various combinations of drug placebo, noncontingent reinforcers, 0.3 mg/kg methylphenidate, 0.7 mg/kg methylphenidate, and self-reinforcement. The combined effects of methylphenidate and self-reinforcement on academic performance were greater than either of the treatments given alone. (JPS)