Teaching:
o Chonnam National University, Gwangju, Korea
[Fall 2016 - present] Instructor, Abstract algebra, Linear algebra 1,2, Mathematics 1,2, Number theory, Special topics in algebra
o University of Iowa, Iowa city, IA
[Fa 2013, Sp 2014, Fa 2015, Sp 2016] Instructor, Engineering Math III: Matrix Algebra(Eval. 5.40/6.00 and 5.20/6.00, Note: Medium-sized classes (70 students per class)), Introduction to linear algebra, Calculus III (Eval. 5.97/6.00 and 5.88/6.00)
o Iowa State University, Ames, IA
[Fa 2014, Sp 2015] Recitation Instructor, Preparation for Calculus (Eval. 4-4.85/5.00 and 4.67-5/5.00), Applied Trigonometry (Eval. 4.61-4.86/5.00), College Algebra (Eval. 4.12-4.41/5.00)
o Purdue University, West Lafayette, IN
[Sp&Fa 2009, Fa 2010, Sp 2012] Instructor, Introductory Analysis II (Eval. 4.3/5.0, 4.3/5.0, 4.9/5.0, and 4.7/5.0), Introductory Analysis I (Eval. 4.8/5.0 and 4.5/5.0), Recitation Instructor, Plane Analytic Geometry and Calculus II (Eval. 4.8/5.0 and 4.8/5.0)
* Grader, MA266 (O.D.E.), MA303 (P.D.E.), MA351 (Linear Algebra), MA385 (Introduction to Logic) and MA453 (Abstract Algebra I)
Services(KMS, Number Theory community, Research program(R&E) for gifted students, and etc):
o Business director, KMS(Education: KMO) (2021.01 ~ 2024.12)
o KMO, KJMO committee member (2019.01 ~ 2024.12)
o A program committee member of Annual Number Theory Workshop 2019-2021
o An advisor (Math), Chonnam National University Science Education Institute for the gifted
2019
o Research program for gifted middle school students at Chonnam National University science education institute for the gifted 2018-2021
Research subject: Platonic solids and Archimedean solids perimeter magic square (Subtitle: rectangular cuboid) (Students: 고표송, 서정원, 안현서, 유현서, 이건승, 정은성) (2021) - Korea Advanced Institute of Science and Technology President's Award (National competition: 2nd award)
Research subject: An Algorithm on base 2 Fermat Pseudoprime (Students: 권수지, 나태영, 성세경, 최성찬) (2020)
Research subject: Archimedean solids non-transitive dice (Students: 김다솜, 이영채) (2019) - Chairman's Award from the University-affiliated Science Gifted Education Center Director's Council (National competition: 4th award)
Research subject: Research on the lower bound of odd perfect numbers (Students: 김주형, 심준영, 한지인) (2018) - Chairman's Award from the Korea Foundation for the Advancement of Science & Creativity (National competition: 3rd award)
o Research program(R&E) for gifted science high school students
Paper: Research on the total number of prime factors of odd perfect numbers not dividing(3, 5, 7, and 11 (with 한지인, 조원희, 김숭산, 김재현), Journal of Science Education for the Gifted, vol. 13, no. 3, 204--212 (2021).