This paper defines the six criteria and also identifies practices that Learning Collaborative members are implementing that partly or entirely fulfilled each criterion. Rather than defining a strict set of practices that may only work in specific conditions, we focus on the technical assistance needed to operationalize the basic principles of integration. Implied in this approach is that there are many models that fulfill the criteria for integration, and that weak points in a model can be strengthened by borrowing practices from others and carefully incorporating them into the existing framework of service delivery.