Overview: Many of the programs that TIER evaluates serve populations facing significant structural and systemic barriers to their well-being, including families involved in the child welfare system, families experiencing challenges related to substance use, and parents and young adults involved in the adult or juvenile criminal justice systems. TIER’s evaluations are framed by multi-level contexts that influence child and family development and well-being, striving to avoid focusing on individual-level factors as explanations for the challenges families face.