Methodology
How we score education gaps.
Scoring Framework
The Education Opportunity Score (EdOS) is a composite index built on the OECD Handbook framework for constructing composite indicators. Three normalised dimensions — School Access (S), Learning Outcomes (L), and Infrastructure Gap (I) — are weighted and combined.
EdOS = wS · S + wL · L + wI · I
Default weights: School Access 35%, Learning 40%, Infrastructure 25%. Users can adjust these in the simulator to match their intervention priorities.
Dimension S
School Access
Ratio of schools to school-age population. Higher = fewer schools per child.
Default weight35%
Dimension L
Learning Outcomes
Composite of NAS scores and pass rates. Higher = worse learning outcomes.
Default weight40%
Dimension I
Infrastructure
Gap in school infrastructure — classrooms, toilets, drinking water, electricity. Higher = greater deficiency.
Default weight25%