Michigan leaders and stakeholders are now working to further strengthen a system of supports for young children’s mental health. Leaders participating in a cross-sector expulsion and suspension workgroup identified a need for current data on ECE teachers’ experiences related to children’s challenging behavior, including perceptions about supports that could increase children’s social emotional well-being and reduce exclusionary practices in center- and home-based ECE settings. To obtain this information, a core team of leaders from MDE and MDHHS and the Head Start State Collaboration Office partnered with the BUILD Initiative and the National Center for Children in Poverty to design and implement a survey of ECE teachers in center-based and home-based ECE settings (pre-kindergarten, child care, Head Start, Early Head Start, and family child care home settings). (author abstract)