Theoretical deliberation on the process of transformation of family system and how its functioning as well as data obtained in course of empirical research specify conditions of development of youth brought up in single-parent families. Picture of situation of educational development functioning of single-parent families gives theoretical knowledge on deficite of these educational environments. The most common hazards are within psychosocial factors. On the basis of obtained data and scientific theories conclusions were drawn for educational practice and requirement of work with families at the school counselor level were finally expressed. Within the framework of activities addressed to families of changed structure both work with children growing up in described environments must be included and work with single parents. Proposed activities should be of repair and support type.