Methodology: How to Read Federal School Statistics
Every figure on Public School Stats comes from a named federal file with a named year. These guides explain the collection, the year stagger, and each measure we publish.
School statistics look authoritative and simple: one enrollment number, one ratio, one spending figure. Behind each sits a collection pipeline — local records kept for operations, state submissions built to federal specifications, and NCES editing, flagging and harmonization — and each stage can bend a number. The guides below document exactly how this site handles the pipeline, so any reader can retrace any figure to its source file: which rows we select, which ratios we compute and from which fields, what we do when an agency does not report an item, and which measures we deliberately do not publish (proficiency rates, pending verified EDFacts files) and why.
- How NCES Collects School Data: The CCD Explained
- Why School Data Years Are Staggered: A Guide
- How Test Proficiency and Graduation Rates Are Measured (EDFacts)
- Student–Teacher Ratio: What It Is and Is Not
- Free and Reduced-Price Lunch Eligibility, Explained
- Per-Pupil Spending: Current Expenditures, F-33 and NPEFS
Our five working rules
1. The year travels with the number. Every figure is labeled with its school or fiscal year, in tables and in prose. 2. No silent blending. Ratios only combine fields from the same file and year. 3. Missing means missing. Unreported items are printed as “not reported,” never estimated. 4. Counts are not rates. Diploma counts are never relabeled as graduation rates; lunch shares are computed only over reporting schools, with the base stated. 5. The file is the record. Our source line names the survey behind every page, and the NCES file — not this site — is the authority if versions differ.
The exact files behind this launch
So any reader can reproduce our numbers, the launch dataset is: CCD LEA Directory, LEA Membership, LEA Staff, School Directory, School Membership, School Staff and School Lunch files, and State (SEA) Membership and Staff files, all school year 2023–24, version 1a (file vintage 073124); CCD LEA and SEA Completers files, 2023–24, version 1a public release of May 14, 2025; the F-33 School District Finance file for fiscal year 2024, version 1a (sdf24_1a); and the NPEFS state finance file for fiscal year 2024, version 1a (stfis24_1a). All were retrieved from the NCES CCD data files service at nces.ed.gov in October 2026. EDFacts assessment files (FS175/FS178) and the cohort graduation file (FS150) are described in these guides but are not in the launch dataset, for the reason given on the proficiency page: the download could not be retrieved and verified during production, and unverified rates are never published here.
For the people behind these rules, see About and our editorial team.
Data: National Center for Education Statistics (NCES) Common Core of Data and EDFacts, retrieved October 2026, from nces.ed.gov. Enrollment, staffing and lunch figures are for the 2023–24 school year; finance figures are fiscal year 2024 (school year 2023–24) unless a page labels them otherwise.
Disclaimer: Public School Stats republishes official federal statistics for general information only. Figures are reported as published by NCES and EDFacts and may include imputed or revised values; for decisions affecting a specific school or district, confirm the figure with the district or the NCES source file. See our full Disclaimer.