The model of the dynamic structure of social situation of development is proposed. The orientation activity as the main concept of P.Ya. Galperin’s theory, amounted the basis to discuss the role and the functions of the orienting the image in the social situation of development structure. Orienting the image realizes the child’s activity-effective attitude to the world. The types of the orienting the images are allocated; the age-related specificity of the images is shown. The mechanism of the developing effect of zone of the proximal development is concretized and analyzed.