By sequential random numbering 10 schools in greater Winnipeg were selected for a nutrition survey. Interviews were conducted with 201 grade 3 children and 182 grade 6 children for whom parental consent was obtained. Of these, 48 in grade 3 and 51 in grade 6 were studied in further detail. There were no differences in descriptive data between the general and detailed groups or among the 10 schools. Most fathers were skilled or unskilled labourers and about 50% of the mothers were homemakers without outside employment; parental occupation did not influence eating patterns. Breakfast was the meal most often missed; 8% of the 383 children had come to school without breakfast. Since many children in grade 3 had prepared their own breakfast and since there was a relative lack of physical activity, school health programs should incorporate more than nutritional supplements and nutrition education. On the basis of body weight and height the nutritional status of the 99 children studied in detail was judged to be generally satisfactory; according to the Boston standards the boys were heavy and tall, and the girls were normal in weight but short.