Cirillo, Michelle2015-12-212015-12-212014Cirillo, M. Supporting the introduction to formal proof. (2014). In Liljedahl, P., Nicol, C., Oesterle, S., & Allan, D. (Eds.) Proceedings of the Joint Meeting of PME 38 and PME-NA 36, Vol. 2, pp. 321-328. Vancouver, Canada: PME.97808649136230771-100Xhttp://udspace.udel.edu/handle/19716/17333In this study, a tool that worked to support teachers with the introduction to formal proof in geometry is discussed. The tool helped teachers navigate the “shallow end” of proof. More specifically, the tool was shown to support teachers with introducing and scaffolding proof. Findings from this study suggest that the tool may be useful for supporting formal reasoning in geometry as well as other areas.Formal proofGeometryArticle