How we score education gaps.
The Education Opportunity Score (EdOS) will be a composite index built on the OECD Handbook framework for composite indicators. It adds three rescaled measures, each with a weight: School Access (S), Learning Outcomes (L) and Infrastructure Gap (I).
EdOS = wS · S + wL · L + wI · I
The default weights are 35% for school access, 40% for learning and 25% for infrastructure. They are provisional, and you can change them in the weighting tool.
School Access
Schools for each child of school age. A higher score means fewer schools per child.
Learning Outcomes
A composite of National Achievement Survey scores and pass rates. A higher score means weaker learning.
Infrastructure Gap
Shortfalls in school buildings and services, including classrooms, toilets, drinking water and electricity. A higher score means larger shortfalls.