University of Oregon


Searchable Proficiency Database

SLA Web: Second Language Acquisition Database

SLA Web Allows Educators and Researchers to Ask Their Own Questions about Student Performance and Investigate the Answer.

Ever wonder if heritage learners can really speak their native language better than they can write it? Want to compare your students' performances with their peers across the country?

SLA Web logo

SLA Web is a large searchable database of L2 spoken and written productions. Data is collected from learners in grades 6-16 using an online proficiency assessment, the Standards-based Measurement of Proficiency (STAMP), developed by CASLS and delivered by Avant.

The Corpus Tool includes productions from more than 40,0000 learners of Chinese, French, German, Hebrew, Japanese, Spanish, and Turkish with more items added regularly. It is freely available online in a standardized format based on the CHILDES database.

The CASLS L2 Databank can be searched using a number of parameters, including school level, class level, immersion and heritage status, and proficiency.

This database significantly enhances the amount of SLA data available to researchers and is a rich resource for the SLA community. Possible projects stemming from the resource could include comparison of immersion and non-immersion productions, the development of clause structure or lexicon, or a cross-language comparison of the emergence of a given language function.

Two Tools are Available

Performance by the Numbers: For Teachers

Go to the Performance by the Numbers Tool

  • Graphs scores from French, German, Japanese, and Spanish test administrations
  • Includes reading, writing, and speaking results
  • Shows test results by language of study, native language, and grade
  • Includes demographic data such as age and years of study
  • Contains data from nearly 20,000 test administrations across the country
Corpus Tool: For Researchers

Go to the Corpus Tool

  • Requires a user name and password
  • Includes responses from speaking and writing prompts in French, German, Japanese, and Spanish
  • Contains responses coded and analyzed using software developed at Carnegie Mellon University
  • Searchable by a number of parameters, including school level, class level, proficiency level, and immersion or heritage status