The Massachusetts Early Childhood Support Organization (ECSO) initiative seeks to improve the quality of early education programs (EEPs) by supporting leaders to strengthen their organizational climate, provide job-embedded professional learning opportunities for educators, support the use of instructional curriculum and child assessments in their program, and engage in continuous quality improvement. This report presents findings from an implementation study conducted by Abt Associates, an independent research firm. The findings are based on data collected from ECSOs and participating EEPs in the 2021-2022 school year, including surveys, classroom observations, and administrative data. Although the findings are descriptive and changes over time cannot be attributed to the initiative because there is no comparison group, they show promise and warrant further study.