In the fall of 2016, the BUILD Initiative launched a CQI Community of Practice (CoP) to bring together leaders in Early Childhood Education (ECE) and Out-of-School Time (OST) with the goal of scaffolding knowledge about CQI through sharing promising practices, asking deep questions and leveraging each other's good work. CoP members were from 19 states and the District of Columbia, working in a range of settings--foundations, higher education, county nonprofits--and in a range of roles: state agency leads, federal TA providers, QRIS coaches, and child care industry executives. The common thread was a passion for quality improvement using a CQI approach and a conviction that what members learn with each other is critical to boosting collective impact. Members knew from experience the potential that CQI has to deepen and sustain quality improvements and ultimately to improve outcomes for children and families. The CoP explored questions such as: - What are the models for CQI and how is CQI different from program improvement plans? Both are informed by data, involve established goals and rely on technical assistance to be successful. - Are there conditions that need to be present and how do we know if an organization is ready for, or already engaged in, CQI? - What can be learned from school reform, the health care field, and others who are engaged in CQI, using a variety of frameworks and tools to guide improvement efforts, to gain collective impact and to speed up, spread, or sustain change? - What does CQI look like, on the ground, in programs? - How can early childhood systems embrace CQI, spreading the adoption of this approach in ways that maximize its potential to foster and sustain improvements in the quality of services, on both program and systems levels? - How is CQI embedded in and supported by professional development? This paper provides a summary of the discussions and key questions the CoP addressed from November 2016 through April 2017. For the purpose of contributing to the incorporation of CQI into quality improvement efforts in ECE and OST programs and systems, this paper offers the group's findings, resources that were shared, and questions for further examination. (author abstract)