Roughly 10% of incarcerated mothers in state prison have a child in a foster home or other state care. Some estimates indicate that as many as 1 in 8 children who are subjects of reports of maltreatment and investigated by child welfare agencies have parents who were recently arrested. Though there is clearly overlap between the prison system and the child welfare system, it is often difficult for prison officials to know how to help incarcerated parents stay in touch with their children in foster care and work towards reunification. Similarly, it is difficult for child welfare agencies to know how to engage parents in prison. The purpose of this toolkit is to help facilitate communication and cooperation between child welfare agencies and federal prisons so that parents can stay engaged in their children's lives.