A new brief from Mathematica details findings from their recent partnership with the W.K. Kellogg Foundation and three community serving organizations in Detroit. As part of the Foundations work to increase access to ECE among Detroit families, this partnership offered child development knowledge and skills programming to 70 informal child care providers in Detroit (all women; 80 percent were Latinx or Hispanic), evaluating the successes and strengths of providers and of the collaborative learning model along the way. Mathematica found that the community-led and community-based forums translated to gains in providers child development knowledge and skills, and that the offerings both professionalized and facilitated connections among these providers who previously had not focused on their child development contributions to the community. The work concludes with recommendations for those seeking to partner with informal care providers under collaborative models in other settings. #childcare #workforce