Early Development Index (EDI)


The Early Developmental Index (EDI) is a school readiness measurement tool. Developed over the course of nearly 30 years, the EDI is a population-based measure of early child development and school readiness in five key domains: physical health, social competence, emotional maturity, language and cognitive skills, and communications skills and general knowledge. Through rigorous, international testing, the EDI has been found to be a reliable indicator of a child’s well-being that has been used to monitor populations of children over time; report on populations of children in different communities; predict how groups of children will do in elementary school; and, inform systems and policies concerning young children and their families.

Collecting EDI tells us how our community’s children are doing, what programs and opportunities are helping and where additional resources need to be deployed to ensure the success of the entire community.The report will help policy makers, nonprofit groups, educators and child advocates to quantify the success of programs and policies in place, uncover pockets of need and collaborate to ensure necessary support reaches all children.


The EDI is a population level assessment. It does not report results on the individual child. The EDI is not a tool to assess schools’ or teachers’ effectiveness. The results of the EDI show the proportion of children who are vulnerable, at-risk, and on track in each developmental domain, by neighborhood. It provides information for the community to look back to identify how it can improve conditions for young children before they reach kindergarten. The Early Developmental Index takes the onus of school readiness off of the teachers.

The EDI data is captured in two ways: use by the school district, and use by the community. Each participating school district receives a School Report (not broken down by classroom), and each district also receives a District Report. Public information that includes EDI tables and maps are available for the community. The EDI provides information based on where children live rather than where they go to school. 

See the Los Alamitos Unified School District EDI Data by Clicking Below:

EDI District Profile Report 2019