Published in March 2014 with support from the Heising-Simons Foundation, this policy report explores the perspectives of nationally recognized experts in the field of mathematics and early care and education about three main issues:1. The knowledge and competencies that practitioners need in order to teach mathematics to young children;2. Effective strategies for educating practitioners to support young children’s mathematical development; and3. The challenges and successes that these experts have experienced in math-related ECE workforce development efforts.