Doctoral Dissertations
Primary Advisor
Knurek, Robert (2025). A collective case study investigating college algebra students’ graph reasoning and conceptions of coordinate systems. School of Education and Human Development University of Colorado Denver. (Heather Lynn Johnson, Advisor).
Whitmore, Kristin A. (2025). An exploration of undergraduate college algebra instructor experiences and dispositions toward teaching with techtivities. Unpublished Ph.D dissertation. School of Education and Human Development University of Colorado Denver. (Heather Lynn Johnson, Advisor).
Gardner, Amber N. (2020). Listening to college algebra survivors: A natural history ethnograpy. Unpublished Ph.D dissertation. School of Education and Human Development University of Colorado Denver. (Heather Lynn Johnson, Advisor). DOWNLOAD
Azeem, Sumbal (2018) Relationship of covariational reasoning on college students’ interpretation of function notation. Unpublished Ph.D. dissertation. School of Education and Human Development, University of Colorado Denver. (Heather Lynn Johnson, Advisor) DOWNLOAD
Committee Member
Wei, Bingqian (2022). Relating elementary teachers’ MKT with their task selection for teaching multiplicative reasoning: A constructivist viewpoint. Unpublished doctoral dissertation, University of Colorado Denver. (Ron Tzur, Advisor)
Harrington, Cody (2021). Progressions in mathematical reasoning: A case study of two teachers’ levels of units coordination. Unpublished doctoral dissertation, University of Colorado Denver. (Ron Tzur, Advisor) DOWNLOAD
Smith, Amy (2021). “Time is when you wait:” An exploration of children’s conceptions of duration as an attribute of their lived experiences. Unpublished doctoral dissertation, University of Colorado Denver. (Ron Tzur, Advisor) DOWNLOAD
Hodkowski, Nicola M. (2018) Manifestations of elementary mathematics teachers’ shifts toward second order models. Unpublished Ph.D. dissertation. School of Education and Human Development, University of Colorado Denver. (Ron Tzur, Advisor) DOWNLOAD
Risely, Rachel (2016). Considerations of numbers used in tasks for promoting multiplicative reasoning in students with learning difficulties in mathematics. Unpublished Ph.D. dissertation. School of Education and Human Development, University of Colorado Denver. (Ron Tzur, Advisor) DOWNLOAD
Lartson, Cobina (2013). Effects of design-based science instruction on the science problem-solving skills among different groups of high-school traditional chemistry students. Unpublished Ph.D. dissertation. School of Education and Human Development, University of Colorado Denver. (Carole Basile, Advisor) DOWNLOAD