||Lee, Youn-Kyoung. (2017). Use of corpus for problem-based learning in a Korean graduate English grammar course. The Linguistic Association of Korea Journal 25(4). 83-102. The present study explored the use of corpus for problem-based learning (PBL) in a Korean graduate English grammar course. The study involved 32 English education students in the Advanced English Grammar and Usage Course. Data included the students corpus research projects, reflection papers about corpus use, a Likert-scale questionnaire, and interview data. The results of the study revealed the following three themes in students use of, and reflection about, corpus study: (1) critical understanding about lexicogrammatical and broader language use issues, (2) awareness of the dynamic nature of language, and (3) appreciation of context- and register-appropriate use of lexicogrammar. The study also discussed the challenges involved in incorporating corpus use into English grammar classes and offered suggestions for further research.