Abstract
This study evaluated the impact ofan extended shelter-based child development/family therapy intervention, called Building Blocks, on the development of children of substance- abusing homeless mothers. The homeless children had greater than expected percentages ofdevelopmental deficits in a number of the developmental domains. Those children who participated in the extended child development/family therapy services were one fourth as likely to have a developmental deficit at 12 months compared to children who did not receive these services. Interventions must be intensive and long-term to improve the developmental outcomes of children with multiple risks ofpoverty, homelessness, and family substance abuse.