Hei Sook Yoo

Hei Sook Yoo

Hei Sook Yoo

Adjunct Faculty

Korean: Korean Linguistics, Language Assessment, Digital Literacy, Online Education

Hei Sook Yoo's entire academic career has been dedicated to teaching and researching the Korean language and culture development in the U.S. and Korea. She received a Ph.D. in Teaching Korean Language and Culture as a Foreign Language from Korea University. She taught and researched the Korean language, culture, and history as an assistant professor at Georgetown University before joining GMU. She has taught a broad scope of students ranging from K-12 to graduate, and various professional groups for all courses in diverse settings. She has developed multiple textbooks and media materials for Korean language and culture at The International Korean Language Foundation and The Korea Foundation. She has also edited and consulted the Korean Dictionary of Daum.net and Naver.com, which are top of Korea's most popular web portal sites. She has developed Testing for TOPIK (The International Standardized Korean Proficiency Test). She holds the National Teaching License for Teaching Korean Language and Culture conferred by the President of Korea. She is a certified ACTFL OPI tester, OPI rater, WPT rater, and AAPPL rater of Korean. She is also currently teaching as a senior lecturer at the Korea Embassy in DC. and serving as the National Korean Spelling Bee Committee director in the U.S. She also received her second Master's degree in online pedagogy and technology integration in Learning Technologies in Schools at George Mason Graduate school. Her current teaching-related research interests lie in developing the Korean language/history curriculum and assessment using digital media literacy and educational technology. To create an online/blended curriculum, she received an honorable national grant for the CIBER Business Language Research and Teaching Awards funded by the U.S. Department of Education. 

Selected Publications


  • Hei Sook Yoo (2024), "Fostering Korean Language, History, and Cultural Identity: Innovative Teaching in the Metaverse and Artificial Intelligence Environments," Journal of Korean-American Education 39, The National Association for Korean Schools.

  • Hei Sook Yoo, et al. (2023), “Issues of Compiling an English Dictionary of Korean Studies for Overseas Korean Studies Majors: Focusing on the case of <English Dictionary of Modern Korean Publications> compilation,” Journal of The Society of Korean Language and Literature 96, The Society of Korean Language and Literature.
  • Hei Sook Yoo (2022), “Exploring Teaching and Learning Methods for Korean Vocabulary in Metaverse Environments,” Journal of Korean-American Education 37, The National Association for Korean Schools.
  • Hei Sook Yoo (2022), “Book Review_Business Korean 비즈니스 한국어. The Routledge Course in Business Korean 1st Edition. 2018,” Global Business Languages 22, GW-CIBER. 
  • Hei Sook Yoo (2021), "A study on the Improvement of Vocabulary Education for Korean School Learners-focusing on the Korean Spelling Bee Contest at NAKS-," Journal of Korean-American Education 36, The National Association for Korean Schools.
  • Hei Sook Yoo, et al. (2020), "Development of Various Course Models for the Unification Era-focusing on Korean Schools and Communities in the US," Journal of Korean-American Education 35, The National Association for Korean Schools.
  • Hei Sook Yoo (2019), “A Study on Blended Learning for Language, Culture, and History for Korean Heritage Education toward 21st Century Digital Literacy,” Journal of Korean-American Education 34, The National Association for Korean Schools.
  • Hei Sook Yoo, et al. (2019), “Exploring the Ways on How to Write Commentaries for Foreign Students in Korea-Focusing on Text Expansion and Comparison,” Journal of the General Education 13-3, The Korean Association of General Education.
  • Hei Sook Yoo, et al. (2015), “An Analysis of Korean college students' and Korean learners' Meta-cognitive Strategies in Writing,” Journal of the International Network for Korean Language and Culture 12-3, The International Network for Korean Language and Culture.
  • Hei Sook Yoo (2015), “Analysis of Learners' Preferences and Needs in Korean Language and Culture Education using Media: A Study based on Business Korean classes in the U.S.,” Korean Cultural Studies 67, Research Institute of Korean Studies.
  • Hei Sook Yoo (2011), “The Current Status and Its Future Prospects of Non-Regular Korean Language and Culture Program-Based on the Program at The Embassy of the Republic of Korea in the U.S.A..,” The Language and Culture 7-1, The Korean Language and Culture Education Society.
  • Hei Sook Yoo (2008), “A Sociolinguistic Study on the Construction and Organization of Conversations in the Korean Language Textbooks-focusing on analyses of construction and sociolinguistic elements of the dialogues-” Ph.D. dissertation, Department of Korean Language & Literature, Korea University.
  • Hei Sook Yoo (2008), “A Sociolinguistic Study on the Constructing of Conversations in Korean Language Textbooks-focused on the Organization of Telephone Conversations-,” Bilingual Research 36, The Korean Society of Bilingualism.
  • Hei Sook Yoo (2007), “An Analysis of English Native Speakers’ Needs and Strategies in Learning Chinese Characters,” Bilingual Research 34, The Korean Society of  Bilingualism.
  • Hei Sook Yoo (2007), “A study on Greeting Expressions in Korean Language Textbooks and Effective Teaching Methods for them,” Journal of Korean Language Education 18-1, The Korean Language Education of International Association for Korean Language Education.
  • Hei Sook Yoo, et al. (2002), “Korean Language Policy for Unification Period,” in How to Unify South-North Korean Language, Kookhak Publisher.
  • Hei Sook Yoo, et al. (1999), “A History of the Studies on Socio-linguistic Dialects,” in A History of the Studies on Modern Korean, Pagijung Press.

Grants and Fellowships


  • Travel Awards, CHSS Interdisciplinary Programming Support Fund, George Mason University, March 2024
  • International Grant for Korean-English Translation Dictionary of Pre-Modern Korean Media Publications from The Academy of Korean Studies, November 2021-2024
  • International Award for the Jikji, the World's Oldest Original Metal Type Print, The Jikji Cultural Foundation, July 2021
  • Online Course Development Grant, The Sterns Center, George Mason University, 2021
  • Mason Core Award, George Mason University, 2020
  • National Grant for the 2019 CIBER Business Language Research and Teaching Awards, the 15 CIBER’s U.S. Department of Education (USDOE) Title VI grants, 2019
  • International Funding Award for the International World Korean Educators Conference, The King Sejong Institute Foundation, July 2019
  • Conference Travel Grant, The Korean Studies Center, George Mason University, June 2019
  • Grant for Departmental Professional Development/Conference, The Asian Studies Program in School of Foreign Service at Georgetown University, January 2017

Courses Taught


  • Intro to the Korean Language (KORE 102), Spring 2020
  • Elementary Korean (KORE 110), Fall 2017, 2018, 2019, 2020, 2021, 2023, 2024 Spring 2019, 2021, 2022, 2023
  • Intermediate Korean 1 (KORE 210), Spring 2018
  • Intermediate Korean 2 (KORE 202), Spring 2008
  • Business Korean (KORE 305-Major Core), Fall 2017, 2018, Spring 2021, 2022
  • Online Course for Business Korean (KORE 305 DL), Fall 2024, Spring 2019, 2020, 2022, 2023
  • Literature and Media (KORE 331), Fall 2019
  • Academic Purpose Writing: Advanced Korean Writing (KORE 370), Fall 2022, Spring 2020
  • Intensive Digital Writing (KORE 370 DL-Mason Core, WI Major Requirement), Fall 2020, 2021
  • Korean Language in Society: Special Topics in Korean Linguistics (KORE 410 DL), Fall 2023