In conjunction with a longitudinal study of the effects of the school environment on the self-concepts and mental health of first- and second-grade students, a primary level group-administered self-report self-concept inventory (PSCI) was developed. The PSCI, based on Pauline Sears' Self-Concept Inventory for middle grades, does not require reading skills. Administration requires two 15-minute sessions. Principle component analyses indicated that seven factors adequately account for the underlying variability of the PSCI. Therefore, two academic and five psychosocial subscales were formed. Test-retest reliability estimates for the seven subscales ranged from .38 to .73. (Author)