This study examined classroom environment and locus of control in identifying successfully children showing high and low self-concepts. In their respective intact classrooms, 107 fourth- and fifth-graders were administered the Piers-Harris Children's Self-concept Scale, the Classroom Environment Scale, and the Nowicki-Strickland Children's Locus of Control Scale. A stepwise discriminant analysis indicated that four variables in combination successfully classified 76% all cases, suggesting the importance of environmental factors associated with classrooms and locus of control in identifying self-concepts of children of elementary-school age.