A longitudinal study covering the 1967-68 school year, the second year of a 4-year study, compared the academic achievement of Indian high school students according to types of schools (public and federal), geographic areas (Alaska, Arizona, Nebraska, New Mexico, Oklahoma, South Dakota, and Utah), grade levels (9-12), and sexes. Results of the California Achievement Tests (CAT), California Short Form Test of Mental Maturity (CTMM), a questionnaire, the Semantic Differential test, and the School Interest Inventory were analyzed using analysis of variance and analysis of covariance. Thirty data tables present the findings of the study. A copy of the Semantic Differential test used is appended. (SW)