1. ACTFL. 2012. “ACTFL Proficiency Guidelines.” Electronic version. Accessed 28 July 2020. https://www.actfl.org/sites/default/files/guidelines/ACTFLProficiencyGuidelines2012.pdf
2. ACTFL. n.d. “Assigning CEFR Ratings to ACTFL Assessments.” Accessed 30 May 2020. https://www.actfl.org/sites/default/files/reports/Assigning_CEFR_Ratings_To_ACTFL_Assessments.pdf
3. Avant Assessment. 2016. “Avant STAMP Results—National Averages 2016.” Accessed 30 May 2020. https://d3itqxtdxl1nz0.cloudfront.net/pdfs/Avant-STAMP-National-Averages-Update-2016-Final-3.pdf
4. Current Perspectives on Vocabulary Teaching and Learning