Requires the department of social and health services, and other state agencies that administer funds related to juvenile offenders or the prevention, treatment, and care of recipients of children's mental health services or child welfare services, as applicable, to expend state funds on: (1) Juvenile justice programs or programs related to the prevention, treatment, or care of juvenile offenders that are evidence-based;

(2) Children's mental health programs or programs related to the prevention, treatment, or care of recipients of children's mental health services that are evidence-based; and

(3) Child welfare programs or programs related to the prevention, treatment, or care of recipients of child welfare services that are evidence-based.

Requires the department of social and health services, in collaboration with the state institute for public policy and the University of Washington evidence-based practice institute, to redirect existing funding resources as necessary to coordinate the purchase of evidence-based services and the development of a workforce trained to implement evidence-based practices.