Reading PDF with covers ↓
The 40-page research guide plus four cover panels, in reading order.
Free PDF · no key required
RESEARCH FILES
Download the research
Download the reader PDF freely to read, save or print. SLP’s prepared data exports require a download key.
Request a data download key by email · info@secondlanguageproject.org
Language Communities: People, Places and Access
Read the companion report · Reading PDF (free, no key)
Community observations CSV (key required) · Community evidence database (key required)
Compare language communities
Person-level associations, age-standardized comparisons and 95% uncertainty.
Open the comparison tool · Read the findings
Microdata estimates CSV (key required) · Evidence database (key required)
SQLite evidence store ↓
ACS estimates, school records, workplace case, references and findings.
Data download · key required
ACS estimates as CSV ↓
All 3,096 records, with geography, count margins of error and English-ability splits.
Data download · key required
ACS data as JSON ↓
Includes geography membership and measurement notes.
Data download · key required
Source registry ↓
Reference metadata, original links and locators.
Data download · key required
Finding-to-source index ↓
Trace report statements to cited evidence.
Data download · key required
School district EL data ↓
2025-26 English learner records with published language categories.
Data download · key required
Workplace case data ↓
San Francisco designated language positions, a separate institutional denominator.
Data download · key required