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Addressing Misconceptions in Secondary Geometry Proof
Cirillo, M. & Hummer, J. (2019). Addressing misconceptions in secondary geometry proof. Mathematics Teacher, 112(6…

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An Efficacy Study on the Use of Dynamic Geometry Software
Jiang, Z. & White, A. (2012). An efficacy study on the use of dynamic geometry software. In the Proceedings of the 12th…

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Animated Contrasting Cases in Geometry
In this collection of materials, four geometric topics are covered in animated, digital materials. There are also paper-based materials for the four…

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Building Mathematical Knowledge for Teaching Proof in Geometry
Presentation slides and handout from the 2019 NCTM Regional Conference in Nashville, TN.…

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Competencies and Behaviors Observed When Students Solve Geometry Proof Problems: An Interview Study with Smartpen Technology
This peer-reviewed research journal publication addresses one of…

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Contrasting Cases in Geometry: Think Alouds with Students about Transformations
There is strong empirical evidence in support of learning from comparisons in mathematics education research (…

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Engaging Students with Non-routine Geometry Proof Tasks
Students who earned high marks during the proof semester of a geometry course were interviewed to understand what high-achieving…

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Illuminating Coordinate Geometry with Algebraic Symmetry
A symmetric polynomial is a polynomial in one or more variables in which swapping any pair of variables leaves the polynomial unchanged…

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Instrumental development of teachers’ reasoning in dynamic geometry
Alqahtani, M. M., & Powell, A. B. (2015, March). Instrumental development of teachers’ reasoning in dynamic geometry.…

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Linear Algebra and Geometry
Linear Algebra and Geometry is organized around carefully sequenced problems that help students build both the tools and the habits that provide a solid basis for…

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Promoting productive mathematical discourse: Tasks in collaborative digital environments
Powell, A. B., & Alqahtani, M. M. (2015). Promoting productive mathematical discourse: Tasks in…

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Randomized Control Trials on the Dynamic Geometry Approach
Jiang, Z., White, A. & Rosenwasser, A. (2011). Randomized Control Trials on the Dynamic Geometry Approach. Journal of…

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Scaffolding Scientific Thinking: Students’ Evaluations and Judgments During Earth Science Knowledge Construction
Critical evaluation underpins the practices of science. In a three-year…

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Tasks promoting productive mathematical discourse in collaborative digital environments
Powell, A. B., & Alqahtani, M. M. (2015). Tasks promoting productive mathematical discourse in…

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Teachers’ support of students’ instrumentation in a collaborative, dynamic geometry environment
Alqahtani, M. M., & Powell, A. B. (2015). Teachers’ support of students’ instrumentation in…

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Teachers' Understandings of Realistic Contexts to Capitalize on Students' Prior Knowledge
The theory of realistic mathematics education establishes that framing mathematics problems…

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Thinking Scientifically in a Changing World
Shifting people’s judgments toward the scientific involves teaching them to purposefully evaluate connections between evidence and alternative…