Will Teachers Create Opportunities for Discussion when Teaching Proof in a Geometry Classroom?
This study presents an analysis of whether geometry teachers create opportunities for student discussion when engaging students in proving as revealed through the use of a multimedia survey instrument. We presented 42 secondary mathematics teachers with 8 multimedia narratives set in the situation of doing proofs in high school geometry and asked them to choose what they would do next, presenting options that included a normative instructional action which closed off discussion and less typical actions that encouraged student discussion. Our analysis provides insight into the professional obligations that teachers use to justify their departure from the norm in order to encourage student talk as well as the background variables that are associated with such decisions. We found that while secondary mathematics teachers frequently chose to promote discussion in their classrooms, the rationale that they chose for this decision and the reasons they might choose not to immediately encourage discussion differed according to the amount of experience they had teaching geometry. We use these differences to illustrate how the professional obligations can be used to better understand how teacher decisions are rationalized at the level of the instructional situation.
KeywordsDecision-making Discourse Discussion Geometry Instructional practices Norms Obligations Instructional situation Practical rationality
The work presented in this paper has been done with support of NSF grant DRL-0918425 to P. Herbst. All opinions are those of the authors and do notnecessarily represent the views of the Foundation.
- Boerst, T., Sleep, L., Ball, D. L. & Bass, H. (2011). Preparing teachers to lead mathematics discussions. Teachers College Record, 113(12), 2844–2877.Google Scholar
- Boyd, D., Grossman, P., Lankford, H., Loeb, S. & Wyckoff, J. (2006). How changes in entry requirements alter the teacher workforce and affect student achievement. Education, 1(2), 176–216.Google Scholar
- Chazan, D. & Lueke, M. (2009). Exploring relationships between disciplinary knowledge and school mathematics: Implications for understanding the place of reasoning and proof in school mathematics. In D. Stylianou, M. Blanton & E. Knuth (Eds.), Teaching and learning of proof across the grades: A k-16 perspective (pp. 21–39). New York, NY: Routledge.Google Scholar
- Cirillo, M., & Herbst, P. G. (2012). Moving toward More Authentic Proof Practices in Geometry. Mathematics Educator, 21(2), 11–33.Google Scholar
- Herbst, P. G. (2006). Teaching geometry with problems: Negotiating instructional situations and mathematical tasks. Journal for Research in Mathematics Education, 37(4), 313–347.Google Scholar
- Herbst, P., Aaron, W., Dimmel, J., & Erickson, A. (2013a). Expanding students’ involvement in proof problems: Are geometry teachers willing to depart from the norm? Paper presented at the annual meeting of the American Educational Research Association, San Francisco, CA. Retrieved from http://hdl.handle.net/2027.42/97425.Google Scholar
- Herbst, P., Aaron, W., & Erickson, A. (2013b). How preservice teachers respond to representations of practice: A comparison of animations and video. Paper presented at the 2013 meeting of the American Educational Research Association, San Francisco. Deep Blue at the University of Michigan. http://hdl.handle.net/2027.42/97424.Google Scholar
- Herbst, P., Kosko, K., & Dimmel, J. (2013c). How are geometric proof problems presented? Conceptualizing and measuring teachers’ recognition of the diagrammatic register. In Proceedings of the 35 th Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (pp. 179–186). Chicago, IL: University of Illinois at Chicago.Google Scholar
- Herbst, P., Chen, C., Weiss, M., González, G., Nachlieli, T., Hamlin, M., & Brach, C. (2009). “Doing proofs” in geometry classrooms. In D. Stylianou et al. (Eds.), Teaching and learning proof across the grades (pp. 250–268). New York, NY: Routledge.Google Scholar
- Kosko, K. W., & Herbst, P. (2012). Evaluating teachers’ decisions in posing a proof problem. In L. R. Van Zoest, J. J. Lo, & J. L. Kratky (Eds.), Proceedings of the 34th annual meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (pp. 813–820). Kalamazoo, MI: Western Michigan University.Google Scholar
- National Governors Association. (2010). The Common Core State Standards. Retrieved from http://www.corestandards.org/the-standards/mathematics
- Stein, M. K. & Smith, M. (2011). 5 practices for orchestrating productive mathematics discussions. Reston, VA: National Council of Teachers of Mathematics.Google Scholar
- Stigler, J. W., & Hiebert, J. (1999). The teaching gap: Best ideas from the world's teachers for improving education in the classroom. New York, NY: Free Press.Google Scholar
- Weekley, J. A., & Ployhart, R. E. (Eds.). (2013). Situational judgment tests: Theory, measurement, and application. Mahwah, NJ: Lawrence Erlbaum.Google Scholar