large sample of; 205 school-children: 106 boy, and 99 girls from a village adjoining Giza Governorate; and 200 school-children; ]09 boys and 91 girls taken from different locations in the New VaHey Governorate.Average age of the sample is 10.71 years old, and a standard deviation of 1.463 years.In this study, blood hemoglobin was measured for the subjects, the 24·111'recall method was used in estimating the quantities of iron and vitamin Co contained in the food ingested during the last 24 hours, Thirdly: two measures for attention" cancellation, and arithmetic if were