Describes a pilot study designed to test evaluation procedures & instruments in preparation for the implementation of the Healthy School project in Yugoslavia. The draw & write investigation technique, suitable for monitoring changes in pupil knowledge during the first 4 grades of elementary school, was administered to 473 pupils in 3 cities: Belgrade, Novi Sad, & Zajecar. Results were compared & tested by age, sex, residence, & type of health-promoting measures mentioned. The technique proved sensitive enough to reveal expected differences in knowledge acquired in school. The technique was accepted by teachers, health workers, & pupils as very attractive & interesting. 1 Table, 7 Figures, 8 References. Adapted from the source document.