This article investigates the effectiveness of a statewide 6-month early childhood mental health consultation (ECMHC) model on teachers' emotional support of children and classroom organization. We provide a brief historical and theoretical background of the field of ECMHC, present the logic model for our ECMHC intervention, and discuss the existing research that supports this logic model. Research Findings: Participants included 445 teachers from 158 child care centers statewide. The mental health consultation improved the quality of early childhood teachers' interactions (e.g., emotional support and classroom organization) with children in their care. Teachers with more experience and more than a high school degree tended to score higher on many of the Classroom Assessment Scoring System (R. C. Pianta, K. M. La Paro, & B. K. Hamre, 2008) dimensions. Practice or Policy: This study demonstrates that mental health consultants can partner successfully with early childhood educators and provide support that enhances classroom variables associated with high-quality care and positive child outcomes. Even with a high rate of teacher turnover (35%), significant differences were found; this demonstrates the robustness of the ECMHC model in that the effectiveness of this model was not undermined by the chronic problem of staff turnover. (Contains 9 footnotes, 4 tables, and 3 figures.)