Hee-Sun Kim (PhD in Linguistics, Stanford University) is a lecturer and the coordinator of the Korean language program at Stanford University. She has been teaching Korean language courses at all levels since 2003. She is the current chair of the Korean Special Interest Group at the American Council on the Teaching of Foreign Languages (2018-2019). She has been a certified ACTFL trainer and tester for Oral Proficiency Interview (OPI) and Writing Proficiency Test (WPT) in Korean and conducted numerous OPI assessment workshops for K-16 language teachers since 2012. She is a certified tester and rater for the Government (ILR) scale, Computerized OPI (OPIc) and ACTFL Assessment of Performance Toward Proficiency in Language (AAPPL). She has been serving as a quality assurance advisor to certified OPI, WPT and AAPPL testers and raters, and on an advising committee for the development of Korean tests and re-norming materials. She also served as an Oversight Committee Member for National Standard Curriculum Project of American Association of Teachers of Korean (AATK). Her current research focuses on the use of technology in language education and the development of proficiency-based curriculum and assessment.