This study investigates the extent to which trained nonprofessional personnel under nursing supervision can effectively conduct health screening of Head Start children. Results of screening by nonprofessional workers are compared with results of the traditional pediatric examinations given each child. A total of four nonprofessional persons selected from the indigenous population, trained by a pediatrician and a psychologist, used the following instruments to facilitate screening: (1) parent interview and physical observation forms prepared by the authors; (2) a revision of the Denver Developmental Screening Test; and (3) the Ammons Quick Test. There was a positive correlation between the results of pediatric examinations and those of aides' screening. Aides' referrals for intellectual and developmental problems also reflected a low but positive correlation with those of psychologists. Results suggest that with little training, aides can be useful in doing health screening under supervision by a nurse, and may thus serve to assist in areas where there is an acute shortage of medical and nursing personnel. A behavior inventory used in the study is included separately. (KJ)