This report describes the design and implementation of the Partners for Fragile Families (PFF) demonstration projects. Operating in 13 sites across the country, PFF provided a range of services aimed at increasing the capacity of young, economically disadvantaged fathers in becoming financial and emotional resources to their children and sought to reduce poverty and welfare dependence. The report examines the programs structure and institutional partnerships; participant characteristics; recruitment and enrollment efforts; the nature of employment, peer support, parenting, and child support-related services provided through the initiatives; and implementation challenges and lessons.