Self-instruction training is a cognitive-behavioral approach to self-control in which children are taught to use covert speech to modify their own behavior. The potential effectiveness of self-instruction training as an intervention technique for school psychologists to enhance student academic and/or social behavior in the classroom is the focus of this review. Research results addressing the practical issues of how, when, and with whom to use this strategy, its generalizability, and its long-term and comparative effectiveness are presented. Implications for further research in the schools are discussed.