The aim of this project, Strengthening the Math-Related Teaching Practices of the Early Care and Education Workforce, has been to identify promising practices and strategies for enhancing the ability of ECE practitioners to promote children's mathematical understanding and competence. This paper summarizes the perspectives of nationally recognized experts in the field of mathematics and early care and education, and how their work is being used, or could be used, in teacher education and professional development opportunities for practitioners working with children age five and younger. We explored the views of experts on three main areas of concern: the knowledge and competencies that practitioners need in order to teach mathematics to young children; effective strategies for educating practitioners to support young children's mathematical development; and The challenges and successes that these experts have experienced in math-related ECE workforce development efforts. (author abstract)