THE EXPERIMENTAL GROUP IN THIS STUDY WAS 112 KINDERGARTEN CHILDREN FROM 11 HEAD START CENTERS. IN ORDER TO ASSESS THE VALUE OF THE HEAD START PROGRAM, THE MEASUREMENT OF THE EXPERIMENTAL GROUP TAKEN DURING THE FALL WAS COMPARED TO A MEASUREMENT OF NON-HEAD START KINDERGARTEN CHILDREN TESTED ABOUT THE SAME TIME. AT LEAST FOUR MONTHS AFTER THE PRETESTING, POSTTESTS WERE ADMINISTERED. THE PRETEST BATTERY CONSISTED OF THE STANFORD-BINET (S-B) AND TWO FORMS OF THE PEABODY PICTURE VOCABULARY TEST (PPVT). THE POSTTEST BATTERY CONSISTED OF (1) S-B, (2) PPVT, BOTH FORMS, (3) THE BEHAVIOR INVENTORY, AND (4) THE METROPOLITAN READING READINESS TEST. THE MOST SIGNIFICANT RESULTS WERE (1) NO DIFFERENCES WERE FOUND BETWEEN THE SCORES OF THE EXPERIMENTAL GROUP AND THE SCORES OF THE CONTROL GROUP, (2) THE CHILDREN SHOWED SIGNIFICANT IMPROVEMENT BETWEEN PRETEST AND POSTTEST PERIODS ONLY ON THE RECEPTIVE FORM OF THE PPVT, (3) THE CHILDREN CONSISTENTLY DEMONSTRATED HIGHER SCORES ON THE S-B THAN ON THE RECEPTIVE PPVT, AND (4) THE PERFORMANCE OF THE KINDERGARTEN CHILDREN APPEARED TO BE AFFECTED BY WHICH SCHOOL THEY ATTENDED AND WHICH TEACHER PRESIDED IN THE CLASSROOM. ALSO 160 HEAD START CHILDREN, WHO WERE TOO YOUNG TO START KINDERGARTEN, WERE TESTED IN THEIR HOMES AND WILL BE USED FOR A FOLLOWUP STUDY. (WD)