- McCulloch, A. W. (2016, April). Preparing to teach mathematics with technology: Expanding, transforming, and building capacity (PTMT-ETC). Poster presented at the
*Envisioning the Future of Undergraduate STEM Education (EnFUSE): Research and Practice.*Washington, D.C. - McCulloch, A. W. (2016, February).
*Preparing teachers to plan and implement technology-based tasks in secondary mathematics*. Invited talk presented to the Purdue University Graduate Program in Mathematics Education. West Lafayette, IN. - McCulloch, A. W., Lee, H. S., Hollebrands, K. F., Chandler, K., & Lovett, J. N. (2016, January).
*Preparing teachers to plan and implement technology-based algebra tasks using open access tools*. Session presented at the annual meeting of the Association of Mathematics Teacher Educators, Irvine, CA. - Hollebrands, K. F., McCulloch, A. W., & Chandler, K. (2015, November).
*High school students’ uses of dragging for examining geometric representations of functions*. Poster presented at the 37th Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education*.*East Lansing, MI. - Whitley, B., Nickell, J., Whitehead, A., & McCulloch, A. (April 2015).
*Modeling Noise-Cancelling Headphones with Trigonometric Functions.*Session presented at the annual meeting of the National Council of Teachers of Mathematics Annual Conference, Boston, MA. - Nickell, J. (February 2015).
*Incorporating Technology to Enhance Teacher Education Lessons and Preservice Teachers’ Learning.*Session presented at the annual meeting of the Association of Mathematics Teacher Educators, Orlando, FL. - Sherman, M., Cayton, C., & Chandler, K. (February 2015).
*Supporting Teachers Using Appropriate Tools Strategically: A Framework for Evaluating and Designing DGS Tasks.*Session presented at the annual meeting of the Association of Mathematics Teacher Educators, Orlando, FL. - Cayton, C., Sherman, M., McCulloch, A., Nickell, J., & Chandler, K. (April 2014).
*Technological tasks, cognitive demand in secondary classrooms, and teacher education.*Research symposium at the annual National Council of Teachers of Mathematics Research Conference, New Orleans, LA. - Lee, H. S., Bos, B., Ozgun-Koca, S. A., Nickell, J., & Chandler, K. (February 2014).
*Supporting teachers in developing technology-based mathematics tasks.*Extended session presented at the annual meeting of the Association of Mathematics Teacher Educators, Irvine, CA.- Presentation details: https://sites.google.com/a/ncsu.edu/amtetech2014/

- Pulis, T., Whitley, K. B., & Lee, H. S. (April 2013).
*Collecting Live Data in Fathom*. Paper presented at the annual meeting of the National Council of Teachers of Mathematics, Denver, CO. - Lee, H. S., Whitley, K. B., & Pulis, T. (April 2013).
*Using Technology Simulations to Reason about Probability and Statistics*. Paper presented at the annual meeting of the National Council of Teachers of Mathematics, Denver, CO. - Hollebrands, K. F., Steketee, S., McCulloch, A. W., Lee, H. S., & Whitley, K. B. (April 2013).
*High School Student’s Thinking About technology-based geometry functions*. An interactive paper session presented at the Research Presession of the National Council of Teachers of Mathematics, Denver, CO. - Lee, H. S., Pulis, T., & Casey, S. (May 2013).
*Preparing to Teach K-12 Statistics: Using Digital Tools for Teaching and Learning*. A session presented at the United States Conference On Teaching Statistics (USCOTS), Raleigh, NC. - Lee, H. S. (May 2013).
*Envisioning a Future Teacher of Statistics in K-12 Classrooms*. Plenary session at theUnited States Conference On Teaching Statistics (USCOTS), Raleigh, NC. - Hollebrands, K. F., Lee, H. S., & Technology Committee Members (January 2013).
*Technology-based tasks in mathematics teacher education.*Extended session presented at the annual meeting of the Association of Mathematics Teacher Educators, Orlando, FL. - Hollebrands, K. F., Lee, H. S., Starling, T. T., Gonzalez, M. D., Pulis, T. (November 2012).
*Prospective high school mathematics teachers’ design and implementation of dynamic geometry tasks.*Paper presented at the thirty-fourth annual meeting of the North American Chapter of the International Group for the Psychology in Mathematics Education, Kalamazoo, MI. - Lee, H. S.(May 2012).
*Quantitative reasoning in a technological world: Laying the pebbles for future research frontiers.*Invited Plenary and Lead Scholar for Working Groups at the International STEM Research Symposium: Quantitative Reasoning in Mathematics and Science Education, Savannah, GA. - Hollebrands, K. F., Lee, H. S., Starling, T. T., Gonzalez, M. D., Pulis, T. (2012, April). Preservice Mathematics Teachers’ Design and Implementation of Interactive Geometry Tasks. Paper presented at the annual meeting of the Research Presession of the National council of Teachers of Mathematics, Philadelphia, PA.
- Lee, H. S., Starling, T. T., Gonzalez, M. D., & Pulis, T. (2012, April). Simulations as a Tool for Reasoning about Probability and Statistics. Session presented at the annual meeting of the National Council of Teachers of Mathematics, Philadelphia, PA.
- Lee, H. S., Harper, S., Driskell, S. O., Kersaint, G., & Leatham, K. (2012, March). Teachers’ statistical problem solving with dynamic technology: Research results across multiple institutions. Invited featured research paper presented at the annual international meeting of the Society for Informational Technology and Teacher Education, Austin, TX. Paper presented was based on the 2012 National Technology Leadership Initiative Fellowship Award.
- Lee, H. S. (2012, February). Tapioca and technology: Lessons learned for a mathematics classroom. Invited Keynote Address at the annual Conference on the Teaching of Mathematics 6-12, Sam Houston State University, TX.
- Lee, H. S., Harper, S., Driskell, S. O., Kersaint, G., & Leatham, K. (2012, February). Teachers’ statistical problem solving with dynamic technology: Research results across multiple institutions. Paper presented at the annual meeting of the Association of Mathematics Teacher Educators, Fort Worth, TX. Authors awarded the National Technology Leadership Initiative Fellowship for Best Research Paper.
- Dick, T., Hollebrands, K., Zbeik, R. M., Heid, M. K., Lee, H. S., Burrill, G., & Cohen, J. (2012, February). Sense making and reasoning with technology: An interactive panel. Three hour presession presented at the annual meeting of the Association of Mathematics Teacher Educators, Fort Worth, TX
- Hollebrands, K. F., Lee, H. S., Gonzalez, M. D., Pulis, T., & Starling, T. T. (2012, February). Prospective high school mathematics teachers’ design and implementation of dynamic geometry tasks. Paper presented at the annual meeting of the
*Association of Mathematics Teacher Educator*, Fort Worth, TX. - Lee, H. S., Driskell, S. O., Harper, S. R., Leatham, K. R., Kersaint, G., & Angotti, R. L. (2011, October). Prospective teachers’ use of representations in solving statistical tasks with dynamic statistical software. Paper presented at the Thirty-third Annual Meeting of the North American Chapter of the International Group for the Psychology in Mathematics Education. Reno, NV.
- Lee, H. S., & Starling, T. T. (2011, October). That is so Random. Workshop session presented at the
*annual conference of the North Carolina Council of Teachers of Mathematics*, Greensboro, NC. - Starling, T. T. & Gonzalez, M. D. (2011, October). Back to the calculator basics. Workshop session presented at the
*annual conference of the North Carolina Council of Teachers of Mathematics*, Greensboro, NC. - Lee, H. S., Hollebrands, K. F., Gonzalez, M. D., Starling, T. T., & Wredberg, C. (2011, January). Preparing to teach mathematics with technology [PTMT]: Engaging practices and materials for technology-using mathematics teachers educators. Four-hour faculty professional development presession presented at the annual meeting of the
*Association of Mathematics Teacher Educators*, Irvine, CA. - Lee, H. S., & Starling, T. T. (2010, October). Designing and using simulations to investigate probability with Fathom and Probability Explorer. Workshop session presented at the
*annual conference of the North Carolina Council of Teachers of Mathematics*, Greensboro, NC.- Details and files at http://www4.ncsu.edu/~hstohl/ncctm2010.htm

- Hollebrands, K. F., Gonzalez, M. D., & Wredberg, C. (2010, October). Exploring properties of quadrialterals using dynamic geometry software.
*Session presented at the Annual Meeting of the North Carolina Council of Teachers of Mathematics,*Greensboro, NC. - Smith, R. C. & Gonzalez, M. D. (2010, February). Integrating Fathom into the High School Mathematics Classroom. A half-day workshop in the use of Fathom in the mathematics classroom for mathematics teachers in Pearson County Schools, Roxboro, NC.
- Hollebrands, K. F., Smith, R. C., Herbst, P., Bush, W. S., Lee, C., Jakubowski, E., & Ronau, R. (2010, January).
*Methods and purposes for assessing high school teachers’ knowledge of geometry*. Research Symposium at the annual conference of the Association of Mathematics Teacher Educators, Irvine, CA. - Lee, H. S., Ives, S. E., Gonzalez, M. D., Starling, T. T., & Shaughnessy, J. M. (2010, January). Helping teachers develop their technological, pedagogical, statistical knowledge (TPSK). Presented at the annual meeting f the
*Association of Mathematics Teacher Educators*, Irvine, CA. - Lee, H. S., Hollebrands, K. F., Gonzalez, M. D., & Smith, R. C. (2010, January). Preparing to teach mathematics with technology [PTMT]: Engaging practices and materials for technology-using mathematics teachers educators. Four-hour faculty professional development presession presented at the annual meeting of the
*Association of Mathematics Teacher Educators*, Irvine, CA. - Lee, H. S. (2009, November). Using Fathom to investigate univariate and bivariate distributions. Invited webinar presented for
*American Statistical Association Webinar Series on K-12 Statistical Education*, November 17, 2009. Archived at www.amstat.org/eduction/webinars. - Lee, H. S. (2009, June). Preparing middle and secondary teachers to use technology in statistics. Poster presented at the
*United States Conference on Teaching Statistics*, Columbus, OH. - Lee, H. S. (Chair), Hollebrands, K. F., Smith, R. C., Ives, S. E., Niess, M., Bowers, J., & Zbiek, R. M. (2009, April). Technology, pedagogy and content knowledge for mathematics teachers. Research Symposium presented at the
*Research Presession of the NCTM*, Washington, DC. - Lee, H. S. (2009, April). Technological statistical knowledge: How dynamic statistical software changes the landscape for statistical thinking. Invited keynote speaker at Key Curriculum Press Technology Users Support Session held at the
*National Conference of Teachers Mathematics*, Washington, DC. - Ives. S. E., Lee, H. S., & Starling, T. T. (2009, February). Preparing to teach mathematics with technology: Lesson planning decisions for implementing new curriculum
*.*Paper presented at the twelfth conference on*Research in Undergraduate Mathematics Education*, Raleigh, NC. - Lee, H. S., & Hollebrands, K. F. (2008, June). Preparing to teach data analysis and probability with technology. Paper presented at the
*Joint Study of the ICMI/IASE*. Monterrey, MX. - Lee, H. S., & Lee, J. T. (2008, February). Emphasizing coordination of measures of center and spread via focus on intervals instead of point values.
*Paper presented at the annual conference of Research in Undergraduate Mathematics Education conference*, San Diego, CA. - Hollebrands, K., Lee, H. S., & Wilson, H., (2007, October). Prospective teachers use of a videocase to examine students’ work when solving mathematical tasks using technology.
*Psychology of Mathematics Education-North America Chapter*. Lake Tahoe, NV. - Wilson, P. H. & Lee, H. S. (2007, October). Supporting bivariate data analysis with univariate techniques with Fathom 2.0. S
*ession presented at the National Council of Teachers of Mathematics Regional Conference*, Kansas City, MO. - Lee, H. S., Hollebrands, K. F, & Wilson, P.H. (2007, September). The use of research-based methods and materials for preparing to teach mathematics with technology.
*Paper presented at the Ninth International Conference, “Mathematics Education in a Global Community”*, Charlotte, NC. - Lee, H. S., Hollebrands, K. F., & Wilson, P.H. (2007, April). Preparing to teach mathematics with technology: Research-based materials.
*Poster presented at the Meeting of the North Carolina Association of Mathematics Teacher Educators,*Greensboro, NC. - Wilson, H., Lee, H. S., & Hollebrands, K. (2007, March). Preparing to teach mathematics with technology: Research-based materials. Poster presentation at the National Council of Teachers of Mathematics Research Presession, Atlanta, GA.
- Lee, H. S., Wilson, P. H., & Hollebrands, K. F. (2007, March). Preparing to teach mathematics with technology: Research-based methods and materials.
*Session presented at the Annual Meeting of the National Council of Teachers of Mathematics,*Atlanta, GA. - Lee, H. S. (Chair), Mojica, G. M., Hollebrands, K. F., Lui, Y., Maher, C., Alston, A., Paulius, M. & Wilson, P. H. (2007, March). Learning to Teach Probability with a Simulation Approach: Focus on Teachers.
*Research symposium and papers presented at the Research Pre-session of the National Council of Teachers of Mathematics*, Atlanta, GA. - Wilson, P. H., Hollebrands, K. F., & Lee, H. S. (2007, January). Preparing to teach mathematics with technology: Prospective teachers’ interpretations of students’ mathematical thinking. Research presentation at the annual meeting of the Association of Mathematics Teacher Educators, Irvine, CA.
- Lee, H. S., Hollebrands, K. F., Wilson, P. H. (2006, October). PTMT: An integrated approach. Presentation at the annual meeting of the North Carolina Council of Teachers of Mathematics, Greensboro, NC.
- Wilson, P. H., Hollebrands, K. F., & Lee, H. S. (2006, October). From univariate to bivariate analysis with
*Fathom*. Presentation at the annual meeting of the North Carolina Council of Teachers of Mathematics, Greensboro, NC. - Wilson, P. H., & Hollebrands, K. F. (2006, January). Preparing to teach mathematics with technology: An integrated approach. Poster session presented at the annual meeting of the Association of Mathematics Teacher Educators, Tampa, FL.
- Hollebrands, K. F., Lee, H. S., & Wilson, P. H. (2005, October). Using videocases to prepare teachers to teach mathematics with technology. Presentation at the annual meeting of the North Carolina Council of Teachers of Mathematics, Greensboro, NC.