Biography and expertise
Dr. Hardison has a Ph.D. in Mathematics Education from the University of Georgia. His primary research interests lie in investigating students' mathematical thinking as underpinned by Thompson's theory of quantitative reasoning. Previous research has involved modeling how students quantify angularity, how these quantifications change over time, and how they vary across contexts. Other interests include studying mathematical classroom discourse, mathematical modeling, covariational reasoning, and discussing radical constructivism. In general, his focus is on supporting practicing teachers (and students) at a variety of levels. He is currently examining how Gen-AI can be used to complexify teaching and learning with a focus on quantitative reasoning and mathematical imagery.
Education
Doctorate Degree
PhD in Mathematics Education
University of Georgia, 2018
Master's Degree
MED in Mathematics Education
University of Georgia, 2008
Bachelor's Degree
BSED in Mathematics Education
University of Georgia, 2006
Teaching Interests
Research Interests
Featured grants
- Lee, Hwa Young (Principal), Hardison, Hamilton Lee (Co-Principal), Zolt, Holly Marie (Other), Bui, Mai Thanh Thi (Other), Rygaard Gaspard, Brandi Renea (Other), Ford, Lucinda Louise (Other). Collaborative Research: Middle School Students' Graphing From the Ground Up (MS-GGU), NSF, Federal, $293841. (Submitted: October 2021, Funded: June 2022 - May 2025). Grant.
- Lee, Hwa Young (Principal), Hardison, Hamilton Lee (Supporting). Undergraduate elementary prospective teachers' conceptions of angle measure: A study of an intervention, REP, Texas State University, $8000. (Submitted: October 2019, Funded: January 2020 - May 31, 2021). Grant.
Featured scholarly/creative works
- Paoletti, T., Lee, H. Y., Hardison, H. L., Zolt, H. M., Olshefke-Clark, A., Bui, M. T. T., & Margolis, C. (2025). “We’ve been… trying to learn communication and kind of like coordinates”: One student’s developing meanings for coordinate systems and reference frames. Mathematical Thinking and Learning. https://doi.org/10.1080/10986065.2025.2595714
- Hardison, H. L. (2024). Mentally Making and Measuring Angles. Mathematics Teacher: Learning and Teaching PK–12, 117(3), 217–223. https://doi.org/10.5951/MTLT.2023.0077
- Hardison, H. L. (2024). Researching Quantifications of Angularity Using Genetic Epistemology Constructs. In Piaget’s genetic epistemology for mathematics education research (pp. 595–604). https://doi.org/10.1007/978-3-031-47386-9_20
- Czocher, J. A., Hardison, H. L., & Kandasamy, S. S. S. (2022). A bridging study analyzing mathematical model construction through a quantities-oriented lens. Educational Studies in Mathematics, 111(2), 299–321.
- Lee, H. Y., Hardison, H. L., & Paoletti, T. (2020). Foregrounding the Background: Two Uses of Coordinate Systems. For the Learning of Mathematics, 40(2), 32–37.
Featured awards
- Award / Honor Recipient: Faculty Award for Excellence in Teaching, TXST Mathematics Department. 2020
- Award / Honor Nominee: Faculty Award for Excellence in Service, TXST Mathematics Department. October 2025
- Award / Honor Nominee: Faculty Award for Excellence in Teaching, TXST Mathematics Department. 2024
- Award / Honor Nominee: Faculty Award for Excellence in Research, Texas State University Mathematics Department. November 2023
- Award / Honor Nominee: Faculty Award for Excellence in Teaching, Texas State University Mathematics Department. November 2023
Featured service activities
- Organizer
Mathematics Education Seminar
- Reviewer / Referee
Canadian Journal of Science, Mathematics, and Technology Education
- Reviewer / Referee
Mathematics Teacher Educator
- Reviewer / Referee
Journal of Mathematics Teacher Education
- Reviewer / Referee
Mathematical Thinking and Learning
- Reviewer / Referee
National Council of Teachers of Mathematics [Books]