The research was conducted in the schools on or near the Crow and the Northern Cheyenne Indian reservations in Montana during October of 1969. All the students, both Indian and white, grades 1 through 12, were involved in the study. Some 2020 Indian students, out of a combined student enrollment of 3626, were assessed as to their bilingual characteristics by interpreters who asked general questions of the Indian students in the Indian languages. Responses were listened to, and recommendations were made to the assessors. It was determined of the 1102 Crow students examined, 82% spoke Crow as a primary language, 8% spoke Crow as secondary language, and 10% spoke only English. Of the 730 Cheyenne students examined, 55% spoke Cheyenne as a primary language, 18% spoke Cheyenne as a secondary language, and 27% spoke only English. The appendix contains enrollment figures and language characteristics by individual school and reservation. (LS)