This review examines research in moral and spiritual development during the adolescent years, with a primary focus on Piaget's and Kohlberg's theories. It begins by presenting definitions of morality and then discusses theories of moral development set forth by Piaget, Elkind, and Kohlberg. Theories of Piaget and Kohlberg are briefly compared. Data supporting a multidimensional model for moral development is compared and evaluated in light of Piagetian and Kohlbergian approaches. Implications for educators are discussed. Tables and figures illustrating Kohlberg's six moral stages; characteristics and assessment of stages; samples of reasoning at each moral stage; scoring of moral judgments of Eichmann for developmental stages; means and standard deviations for early, middle, and late adolescent males and females on dimensions of moral reasoning; and the Heinz dilemma are appended. Five pages of references are included. (NB)