Father engagement is an integral part of family engagement. This Guide provides information about serving expectant fathers and fathers of infants, toddlers, and preschoolers, as well as other men who play a significant role in the lives of young children. It is designed for all Head Start staff, starting with program leaders and managers who shape program policy. It also is designed for direct service staff who interact with fathers, including teachers, family service workers, home visitors, health staff, and transportation providers. This Guide is useful for parent leaders. (author abstract)