The most comprehensive Grade 3-8 student assessment database in America.
Spring 2025 results are in for all 50 states. Filter by state, year, grade, subject and subgroup. Preview the rows, export a clean CSV, or wire it into your analysis with the API.
The dataset
Clean and timely assessment data from every state.
Built from public records - state education agencies and federal NCES - and documented in a codebook you can check.
Three ways in
However you work, the data meets you there.
Start with a question, pull a clean file, or wire it straight into your analysis.
For everyone
Explore with Zelma AI
Ask in plain English and get a chart, a table, and a written answer in seconds - with a link back to the exact underlying data.
For researchers
Download the data
Filter by state, year, grade, subject and subgroup, preview the rows, then export a clean CSV with a full codebook.
Browse & download data →For developers
Query the API
A developer-friendly endpoint that drops straight into R, Stata, and Python. Copy a ready-made call from any download screen.
Read the API docs →Built to travel
Every graph is a shareable link.
Answer a question once and it becomes a page anyone can open or send along - no login, no screenshot. Journalists and policymakers reach your data through the work people share.
See a live example →Why researchers trust it
Rigor you can cite.
Sourced & documented
Assembled from public sources - state education agencies, reconciled with federal NCES identifiers - and documented in a codebook, so you can see where the numbers come from.
Versioned & changelogged
Data ships in numbered releases (currently v3.1) with a public changelog, so a citation made today still resolves the same way later.
Free, with attribution
Free for research and other non-commercial use, with attribution; commercial use requires permission. Funders have no involvement in what the data says. See the Terms of Service.
How to cite
Education Data Center. (2026). State Assessment Data Repository (Version 3.1) [Data set]. Retrieved [Month DD, YYYY], from https://www.eddatacenter.org/data
Latest updates from the EDC State Test Score Substack
State results, as they land.
South Dakota: 2026 Assessment Results
Results show ELA held steady at 49.4% across Grades 3-8; math shows small gains for a third straight year
Read on Substack →November 5, 2026New Jersey: 2026 Assessment Results
New NJSLA-Adaptive assessment sets new baseline: 51.1% proficient in ELA and 41.4% in math across grades 3-8
Read on Substack →November 2, 2026Illinois: 2026 Assessment Results
ELA gains outpace math in second year under new cut scores; Chicago Public Schools gained in both subjects
Read on Substack →Start with a question.
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