A PILOT PROJECT IN WHICH 47 MENTALLY HANDICAPPED NAVAJO CHILDREN WERE ENROLLED IN SPECIAL CLASSES AT THE TEEC NOS POS BOARDING SCHOOL IN TEEC NOS POS, ARIZONA, IS DESCRIBED. THESE CHILDREN WERE SELECTED FROM THE SAN JUAN AND SHIPROCK BOARDING SCHOOLS BY USE OF A TEACHER REFERRAL FORM. THE PROJECT WAS DIVIDED INTO FIVE PHASES--(1) SCREENING OF CHILDREN TO DETERMINE THOSE WHO WERE MENTALLY RETARDED, (2) PREPARING INDIVIDUAL BEHAVIORAL PROFILES ON EACH OF THE SELECTED CHILDREN, (3) MEDICAL AND PARAMEDICAL EXAMINING OF THE REFERRAL GROUP, (4) STAFFING THESE CHILDREN TO DETERMINE THE NATURE OF HANDICAPPING CONDITIONS, AND (5) TEACHER AND SUPERVISION, SPECIAL CLASS ORGANIZING, AND THE INSTRUCTIONAL PROGRAM. PARTICULAR EMPHASIS IS GIVEN TO DESCRIPTION OF THE USE AND RESULTS OF PSYCHOLOGICAL TESTS USED IN THE PROJECT. A DISCUSSION OF TEACHING ENGLISH AS A SECOND LANGUAGE TO NAVAJO CHILDREN IS INCLUDED IN AN ATTACHED APPENDIX. (ES)