This study provides concurrent and predictive validity and test-retest reliability evidence for scores from the preschool teacher-completed Preschool Learning Behaviors Scale (PLBS; McDermott, Green, Francis, & Stott, 2002) using two regional samples of preschool children aged 3 to 5.5 years (Ns of 61 and 70). Teacher ratings of social skills and problem behaviors were collected using the Preschool and Kindergarten Behavior Scales (PKBS; Merrell, 1994), and estimates of preschoolers' basic concept attainment were obtained using the individually administered Bracken Basic Concept Scale (BBCS; Bracken, 1984). Results indicated that preschoolers' adaptive learning behaviors were positively correlated with social skills and negatively associated with problem behaviors but were not significantly related to subsequent basic concept attainment. Four-week test-retest coefficients for the PLBS Total score and Competence Motivation, Attention/Persistence, and Attitude Toward Learning subscale scores were adequate. Results support the unique contribution of PLBS scores in understanding children's responses to learning activities in preschool classroom environments. (Contains 4 tables.)