The World Bank created this Early Child Development (ECD) Guide in response to a growing demand from Task Team Leaders (TTLs) for advice and support to facilitate the policy dialogue on the topic of ECD and to help policy makers make and implement relevant choices on how to best invest in ECD in the context of their country's economy and national priorities. This Guide fills a gap in the literature by (i) distilling existing information in a user-friendly format, (ii) providing practical information on topics that have recently become particularly relevant in ECD (e.g., measuring child...