Navajo family participation in the evaluation of their children is described in this paper. The setting for the study in St. Michael's Special School, Window Rock, Arizona. Pupils at this Navajo Reservation school were assigned to special education classes on the basis of the Wechsler Intelligence Scale for Children. The author introudced into the evaluations the Hiskey-Nebraska Test of Learning Aptitude. This instrument, developed for use with deaf children, requires no verbal instructions or verbal responses. Use of this nonlanguage individual test when combined with family participation resulted in significantly different scores and much more satisfactory evaluations and placements than had previously used instruments and evaluation techniques. The current emphasis has been placed on the validation of the Hiskey-Nebraska Test of Learning Aptitude for use with bilingual minority group children. Norms tables for American Indian and Mexican American children will be developed. (FF)