Starting Strong III: A Quality Toolbox for Early Childhood Education and Care (ECEC) has identified five policy levers that can encourage quality in ECEC, having positive effects on early child development and learning. The OECD Secretariat would like to thank the national co-ordinators, Richard Walley, Julie Keenan, Ann Armstrong and David Scott, for their work in providing information. We would also like to thank all those who gave their time to respond to our many questions, provide comments on preliminary drafts and validate the information for accuracy. We would also like to thank consultants Janice Heejin Kim and Matias Egeland who worked on sections of the preliminary drafts as part of the OECD team on Early Childhood Education and Care. The online toolbox has additional information, such as a country materials page where actual documents from OECD countries are presented, including curricula, regulatory frameworks and data systems information.