A preschool version of the Classroom Behavior Inventory which provides a method for collecting valid data on a child's classroom behavior from day care and preschool teachers, was developed to complement the earlier form which was developed and validated for elementary school populations. The new version was tested with a pilot group of twenty-two teachers who rated 100 day care children, ranging in age from two to six years. Internal consistency of scales, inter-rater reliabilities and factor analysis support the usefulness of this method for research on preschool children. The Inventory includes scales of verbal intelligence, considerateness, hostility, extraversion, introversion, creative/curiosity, apathy, independence, dependence, task orientation and distractibility. These data replicate hierarchical configurational models for adaptive behavior that have been developed from a number of empirical studies of elementary school children. The method appears to have validity for cross sectional and longitudinal research and may contribute to screening and evaluation of child academic competence and social adjustment. (Author/MP)