Stanford Education Data Archive (SEDA 2025.1) evidence ladder
Version 2025.1; pooled 2022-2025 evidence preferred, 2009-2019 explicitly historical- Data
- All-student achievement and growth evidence at administrative-district, school, and state resolution. Public School Quality selects the highest available same-period tier and records the tier, resolution, proxy method, and uncertainty in every score receipt.
- What it tells us
- Preserves a nationwide school-quality signal while distinguishing direct district evidence from school aggregation, state-anchored estimation, and low-resolution statewide estimation. A fallback is less geographically specific than direct district evidence and is not an attendance-zone rating.