Infant, toddler, and preschool children's relationships with mothers and teachers were examined in this study. 110 children were observed with their mothers during child care arrivals and reunions. 403 children were observed with their teachers in child care. 3 categories of relationships were derived from these observations. Children in the secure relationship category experienced more teacher involvement than children in the avoidant or ambivalent relationship categories. Children in the ambivalent relationship categories experienced more teacher involvement than children in avoidant relationship categories. A subsample (n= 23) of children were seen with their mothers both during child care arrivals and reunions and in the Strange Situation. Relationship classifications were similar.