This one and a half day event was organized by the Strategic Impact Evaluation Fund at the World Bank. Lead researchers in the field of nutrition and early childhood development were invited to discuss ways of measuring nutrition and child development outcomes, to share common patterns of variation and to brainstorm about what works. Particular emphasis was given to domains and instrument choice in the context of the intervention and setting, and trade-offs in terms of fieldwork administration and logistics. The two key workshop objectives were: (1) To share experiences and challenges measuring nutrition and early childhood development outcomes for children 3 to 6 years old, and (2) To discuss future directions for measuring early childhood development outcomes.