In Exp. I, five pre-delinquents from Achievement Place attended a special summer school math class where study behavior and rule violations were measured daily for each boy. The boys were required to take a "report card" for the teacher to mark. The teacher simply marked yes or no whether a boy had "studied the whole period" and "obeyed the class rules." All yeses earned privileges in the home that day but a no lost all the privileges. Using a reversal design, it was shown that privileges dispensed remotely could significantly improve classroom performance. In Exp. II and III, home-based reinforcement was also shown to be effective in improving the study behavior of two youths in public school classrooms. In addition, data from Exp. III suggest that the daily feedback and reinforcement may be faded without much loss in study behavior. Home-based reinforcement was demonstrated to be a very effective and practical classroom behavior modification technique.