1. American Council on the Teaching of Foreign Languages. (2012).ACTFL Proficiency Guidelines 2012. Retrieved fromhttps://www.actfl.org/sites/default/files/pdfs/public/ACTFLProficiencyGuidelines2012_FINAL.pdf
2. American Council on the Teaching of Foreign Languages. (2016).Assigning CEFR ratings to ACTFL assessments. Retrieved fromhttps://www.actfl.org/sites/default/files/reports/Assigning_CEFR_Ratings_To_ACTFL_Assessments.pdf
3. American Councils for International Education. (2017).The national K‐12 foreign language enrollment survey report. Retrieved fromwww.americancouncils.org/sites/default/files/FLE‐report‐June17.pdf
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