I am interested in the following research areas.
Connection between collegiate mathematics and school mathematics
Mathematical knowledge construction at the post-secondary level
Advanced mathematical knowledge in teacher education; Teacher knowledge
Teacher's discursive capacity; Classroom discourse
Use of technology in teaching of mathematics
National Science Foundation, Robert Noyce Teaching Scholarship program. ($1,448,743, April 2021 -March 2026, Award Number: 2050472). Title: "A Collaborative Approach to Recruiting, Preparing, and Retaining STEM Teachers from Community College to University and Beyond," PI: Sherwood, C-A., co-PIs: Broadbridge, C., Coca, A., Lee, Y., & Spencer, S. http://www.nsf.gov/awardsearch/showAward?AWD_ID=2050472&HistoricalAwards=false
National Science Foundation, Advancing Informal STEM Learning (AISL) program. ($617,974, not funded). Title: "MaPP Challenge: Using Puzzle Scavenger Hunts to Connect Secondary Students to Contemporary Mathematics Research," PI: Lee, Y., co-PIs: Carrigan, B., Jones, C., Ferebee, D., & Robinson, T.
National Science Foundation, Improving Undergraduate STEM Education (IUSE) program. ($1,676,566, not funded). Title: "Developing Conceptually-based Geometry and Measurement Class Materials for Preservice Teachers to Promote Effective Teaching Practices," PI: Hong, D., co-PIs: Choi, K. M. & Lee, Y.
CSU - AAUP Faculty Research Grants 2023-24. ($10,995, funded). Title: “Fostering diversity in STEM by empowering youth to experience contemporary mathematics by means of discovery and exploration in the MaPP Challenge," PI: Lee, Y., co-PIs: Carrigan B. & Pang Y.
SCSU Faculty Creative Activity Research Grants 2024-25. ($2,500, funded). Title: “Transforming the math and math education major experience at Southern through solving the double-discontinuity problem," PI: Lee, Y.
Choi, K. M., Lee, Y., Lee, Y., & Hwang, J. (2025). Change the journal title to reflect evolving focus. Mathematics Education Research and Practice, 28(1), 1-4. https://doi.org/10.7468/jksmed.2025.28.1.1
Lee, Y. (2024). Beyond Gauss Sum in “Proof by Tomatoes.” Mathematics Teacher: Learning and Teaching Pre-K–12, 117 (5). https://doi.org/10.5951/MTLT.2023.0268
Kim, D-J., Choi, S-H., Lee, Y., & Lim, W. (2021). Secondary Teacher Candidates’ Mathematical Modeling Task Design and Revision. Mathematics, 9 (22). https://doi.org/10.3390/math9222933
Bonafini, F. & Lee, Y. (2021). Portraying mathematics pre-service teachers' experience of creating video lessons with portable interactive whiteboards through the TPACK. The New Educator, 17, 327-352. https://doi.org/10.1080/1547688X.2021.1980167
Bonafini, F. & Lee, Y. (2021). Investigating prospective teachers’ TPACK and their use of mathematical action technologies as they create screencast video lessons on iPads. TechTrends, 65, 303-319. https://doi.org/10.1007/s11528-020-00578-1
Kim, D., Shin, J., Lee, J-E., Lim, W., Lee, Y., & Choi, S. (2019). Conceptualizing discursive teaching capacity: A case study of a middle school mathematics teacher. Journal of the Korean Society of Mathematical Education, 21 (2), 291-318. http://dx.doi.org/10.29275/sm.2019.06.21.2.291
Lim, W., Lee, Y., & Lee, J-E. (2019). Finding the volume and surface area in the gut. Australian Mathematics Educational Journal, 1 (1), 11-15.
Lee, Y., Qi, L., & Lim, W. (2018). An application of mathematics to computer programming: Connecting translation vectors, the Minkowski Difference, and collision detection. Mathematics Teacher, 112 (2), 150-154. https://doi.org/10.5951/mathteacher.112.2.0150
Lee, Y., & Lim, W. (2017). Shoelace formula and vector cross product. Mathematics Teacher, 110 (8), 631-636. https://doi.org/10.5951/mathteacher.110.8.0631
Lee, Y., Carrigan, B., Clontz, S., Couch, P., Jones, C., Noble, A., Owens, A., & Pang, Y. (In Press). MaPP Challenge: Giving a Taste of Contemporary Mathematics Research to Secondary Students in a Puzzle-based Outreach Program. In M. Huntley, D. Thompson, & C. Suurtamm (Eds.), Mathematics Outreach: Examples and Impact From Across the Globe, to be published by Emerald.
Lee, Y., & Heid, M. K. (2018). Developing a structural perspective and its role in connecting school algebra and abstract algebra: A factorization example. In N. H. Wasserman (Ed.), Connecting Abstract Algebra to Secondary Mathematics, for Secondary Mathematics Teachers (pp. 291-318). Springer. https://doi.org/10.1007/978-3-319-99214-3_14
Heid, M. K., Grady, M., Jairam, A., Lee, Y., Karunakaran, S., & Freeburn, B. (2014). A process lens on a beginning teacher's personal and classroom mathematics. In J. Lo, K. R. Leatham, & L. R. Van Zoest (Eds.), Research Trends in Mathematics Teacher Education (pp. 67-82). New York, NY: Springer. [Reprinted from Proceedings of PME-NA (2012)] https://doi.org/10.1007/978-3-319-02562-9_4
Noh, S., Kim, J., Park, J., Sim, S., Park, H., Lee, H., Joe, E., Kang, M., Hong, E., Lee, Y., & Lee, H. (2008). XO O-Dab-Note: High School Mathematics 1, Seoul, Korea: Bookdream publication.
Lee, Y. (2020). Framework for characterizing university students’ reorganization of school mathematics understandings in their collegiate mathematics learning. In S. S. Karunakaran, Z. Reed, & A. Higgins (Eds.), Proceedings of the 23rd Annual Conference on Research in Undergraduate Mathematics Education (pp. 358-365). Boston, MA.
Bonafini, F. C., & Lee, Y. (2018). Pre-service teachers’ use of TPACK through the creation of video lessons using iPad. In T. E. Hodges, G. J. Roy, & A. M. Tyminski (Eds.), Proceedings of the 40th annual meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (p. 1276). Greenville, SC: University of South Carolina & Clemson University.
Kim, D., Choi, S., Lee, Y., & Lim, W. (2018). Drawing a picture of practice-based teacher competency for discursive mathematics pedagogy. In T. E. Hodges, G. J. Roy, & A. M. Tyminski (Eds.), Proceedings of the 40th annual meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (p. 1141). Greenville, SC: University of South Carolina & Clemson University.
Lee, Y. (2015). Connecting collegiate mathematics to school mathematics: prospective secondary mathematics teachers’ construction of abstract mathematical conceptions. In T. G. Bartell, K. N. Bieda, R. T. Putnam, K. Bradfield, & H. Dominguez (Eds.), Proceedings of the 37th annual meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (p. 423). East Lansing, MI: Michigan State University.
Lee, Y. (2015). Prospective secondary mathematics teachers’ understanding of abstract mathematical structures. In T. Fukawa-Connelly, N. Infante, K. Keene, & M. Zandieh (Eds.), Proceedings of the 18th Annual Conference on Research in Undergraduate Mathematics Education (pp. 685-686). Pittsburgh, PA.
Heid, M. K., Jairam, A., Lee, Y., & Grady, M. (2014). Classroom use of representations by novice secondary mathematics teachers. In Oesterle, S., Nicol, C., Liljedahl, P., & Allan, D. (Eds.), Proceedings of the Joint Meeting of the 38th Annual Meeting of the International Group for the Psychology of Mathematics Education and the 36th Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (p. 6-97). Vancouver, Canada: PME.
Heid, M. K., Grady, M., Karunakaran, S., Jairam, A., Freeburn, B., & Lee, Y. (2012). A process approach to mathematical knowledge for teaching: The case of a beginning teacher. In L. R. Van Zoest, J-J. Lo, & J. L. Kratky (Eds.), Navigating Transitions Along Continuums: Proceedings of the 34th Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (pp. 430-437). Kalamazoo, MI: Western Michigan University.
Lee, Y. (invited; 2025, November). Leveraging a Puzzle-Hunt Format to Inspire Contemporary Mathematics Learning: Insights from Three Years of the MaPP Challenge. An invited lecture presented at the 2025 International Conference of the Korean Society of Mathematical Education, Daegu, South Korea.
Lee, Y. (invited; 2025, October). Designing a research study in mathematics education. A session presented at a colloquium (M1867, Thesis Supervision in Mathematics Education) at Seoul National University, Seoul, South Korea.
Lee, Y. (invited; 2025, October). Reconstructing the Understanding of School Mathematics Through University Mathematics: An Inquiry Using the EDUS Framework. A session presented at a colloquium (Invited lecture series) at Korea National University of Education (KNUE), Cheongju-si, South Korea.
Lee, Y. (invited; 2025, May). Shoelace Formula and Beyond: Mathematical Thinking through Justification and Generalization. An invited talk presented at the Introduction to Modern Mathematics (MAT 115) at The Southern Connecticut State University, New Haven, CT.
Lee, Y. (2024, January). Panel on Looking Forward and Back: Common Core State Standards in Mathematics (CCSSM) 12 Years Later I. A session presented at the Joint Mathematics Meetings 2024 [Special Session "Looking Forward and Back: Common Core State Standards in Mathematics (CCSSM), 12 Years Later"] San Francisco, CA.
Lee, Y. (2023, November). Making Mathematics Accessible to a Broader Population through the MaPP Challenge. A presentation submitted to the Fall 2023 Faculty Tapas at Southern Connecticut State University, New Haven, CT.
Lee, Y. & Kruczek, K. (2023, May). Connecting Algebra 2 and College Algebra. A Round Table Session on Connecticut Council of Leaders of Mathematics, Zoom.
Lee, Y. (2023, February). The broken-line graph shown here describes the journey of a travelling car. Can a single rule over the entire trip describe this broken-line graph? A math seminar talk session presented at Southern Connecticut State University, New Haven, CT.
Lee, Y. (2022, October). Changes to Praxis Content Tests. A session presented at the 2022 Fall Association of Mathematics Teacher Educators of Connecticut Conference, West Hartford, CT.
Lee. Y., & Carrigan, B. (2022, October). Understanding the impact of a puzzle-based scavenger hunt program on participants’ conceptions of mathematics. Paper presented at the Northeastern Research in Undergraduate Mathematics Education 6th annual conference, Zoom.
Lee, Y., Owens, A., Carrigan, B., Clontz, S., Couch, P., & Jones, C. (2022, August). MaPP Challenge: Integrating Research Mathematics into a Puzzle-hunt Format. Paper presented at the MAA MathFest 2022 [Themed Contributed Paper Session "Inviting High School Students to Explore Advanced Mathematics"], Philadelphia, PA.
Lee. Y., & Bonafini, F. C. (2021, January). Pre-service teachers’ use of technology: Exploring opportunities to amplify and reorganize students’ thinking through the creation of video lessons. Paper presented at the Joint Mathematics Meetings of the Mathematical Association of America and the American Mathematical Society [Themed Contributed Paper Session "Combining Technological Tools and Innovative Practices to Improve Student Learning Outcomes"], Zoom.
Lee. Y. (2020, August). Transformative transition in ones’ understanding of factorization. Paper presented at the 2020 Fall Conference of the Korean Society of Mathematics Education (KSME), Zoom.
Lee, Y. (2020, February). Framework for characterizing university students’ reorganization of school mathematics understandings in their collegiate mathematics learning. Paper presented at the 23rd Annual Conference on Research in Undergraduate Mathematics Education, Boston, MA. *See also PUBLICATIONS for a related paper published in the conference proceedings.
Lee, Y. (invited; 2020, February). Designing a dissertation study in mathematics education. A session presented at a colloquium (MTHED 590) at The Pennsylvania State University, University Park, PA.
Lee. Y. (2019, October). University students’ understanding of factorization through the lens of APOS theory. Paper presented at the Northeastern Research in Undergraduate Mathematics Education 3rd annual conference, Jamaica, NY.
Lee. Y. (2019, January). Developing an advanced viewpoint on school mathematics in the learning of collegiate mathematics: Through the lens of a transformative transition framework. Paper presented at the Joint Mathematics Meetings of the Mathematical Association of America and the American Mathematical Society [MAA Contributed Paper Session on Research in Undergraduate Mathematics Education], Baltimore, MD.
Bonafini, F. C., & Lee, Y. (2018, November). Pre-service teachers’ use of TPACK through the creation of video lessons using iPad. Paper presented at the 40th Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education, Greenville, SC. *See also PROCEEDINGS for a related paper published in the conference proceedings.
Kim, D., Choi, S., Lee, Y., & Lim, W. (2018, November). Drawing a picture of practice-based teacher competency for discursive mathematics pedagogy. Paper presented at the 40th Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education, Greenville, SC. *See also PROCEEDINGS for a related paper published in the conference proceedings.
Kim, D., Choi, S., Lee, Y., & Lim, W. (2018, September). Outlining the technology-based mathematical discourse for teaching. Paper accepted at the 8th Annual International Conference on Education & e-Learning – EeL, Singapore.
Bonafini, F. C., & Lee, Y. (2018, April). Characterizing Prospective Secondary Mathematics Teachers’ Experience of Creating Video Lessons using iPad. Paper presented in the round table session at the meeting of the American Educational Researchers Association annual conference, New York, NY.
Lee, Y. (2015, November). Connecting collegiate mathematics to school mathematics: Prospective secondary mathematics teachers’ construction of abstract mathematical conceptions. Paper presented at the 37th Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education, East Lansing, MI. *See also PROCEEDINGS for a related paper published in the conference proceedings.
Heid, M. K., Lee, Y., & Jairam, A. (2015, April). Characteristics of classroom representation use by novice secondary mathematics teachers. Paper presented in the poster session at the meeting of the American Educational Researchers Association annual conference, Chicago, IL.
Lee, Y. (2015, February). Prospective secondary mathematics teachers’ understanding of abstract mathematical structures. Paper presented in the poster session at the meeting of the Research in Undergraduate Mathematics Education 18th annual conference, Pittsburgh, PA. *See also PROCEEDINGS for a related paper published in the conference proceedings.
Heid, M. K., Jairam, A., Lee, Y., & Grady, M. (2014, July). Classroom use of representations by novice secondary mathematics teachers. Paper presented at the 38th Annual Meeting of the International Group for the Psychology of Mathematics Education (and the 36th Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education), Vancouver, Canada. *See also PROCEEDINGS for a related paper published in the conference proceedings.
Lee, Y. (2014, April). A prospective mathematics teacher’s understanding of “Abstract algebra for teaching.” Paper presented in the round table session at the meeting of the Korean- American Educational Researchers Association 5th annual conference, Philadelphia, PA.
Heid, M. K., Grady, M., Karunakaran, S., Jairam, A., Freeburn, B., & Lee, Y. (2012, November). A process approach to mathematical knowledge for teaching: The case of a beginning teacher. Paper presented at the 34th Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education, Kalamazoo, MI. *See also PROCEEDINGS for a related paper published in the conference proceedings and a related book chapter.
Lee, Y. (2012, October). Use of college mathematics knowledge for teaching school mathematics. Paper presented at the 61st Annual Conference of the Pennsylvania Council of Teachers of Mathematics, Camp Hill, PA.
Heid, M. K., Grady, M., Karunakaran S., Jairam, A., Freeburn, B., & Lee, Y. (2012, April).Influences on mathematical process use by a novice teacher. Paper presented at the National Council of Teachers of Mathematics 2012 Research Presession, Philadelphia, PA.
Lee, Y. (2011, May). Professors’ perspectives on an abstract algebra course’s role in teacher education programs. Poster session presented at the University of Iowa Department of Teaching and Learning Research Symposium, Iowa City, IA, May 2011.