As child welfare systems across the country face the problem of parental substance abuse, there is an increasing need to understand the types of treatment approaches that are most effective for substance-abusing parents in the child welfare system-the majority of whom are mothers. This structured review of the literature focuses on evidence related to two areas: (1) individual-level interventions designed to assist mothers and women in addressing their substance abuse problems, and (2) system-level interventions designed to improve collaboration and coordination between the child welfare...