Education Data Center

The Education Data Center (EDC) is a public repository of US state assessment data. It gives researchers, policymakers, and educators a central place to find and work with standardized test results from across the country. The site includes a custom AI tool called Zelma that lets you ask questions about the data in plain English and get answers instantly. You can also download raw data files, browse codebooks, and view an interactive map of assessment results.

The EDC stands out because it combines a large, curated dataset with an AI query layer. Instead of digging through spreadsheets, you can type something like "Show me math scores for 4th graders in California over the last five years" and Zelma returns the relevant numbers. The platform also offers an API for developers who want to integrate the data into their own tools. Version 3.1, recently released, includes updated data and improvements to the AI interface.

This tool is most useful for education researchers who need reliable state-level assessment data, school district administrators looking to benchmark performance, and policy analysts who want to track trends. It's also valuable for journalists covering education and for graduate students working on theses or dissertations. The EDC is free to use, with a donation option to support its operation.