GeT Seminar — November 6th


Animated Contrasting Cases in Geometry (AC2inG): The Design of New Geometry Curricular Modules


Friday, November 6
11:00 am PT | 12:00 pm MT | 1:00 pm CT | 2:00 pm ET
Presenters: Erin Krupa, Brianna Bentley, & JP Mannix

Summary: The AC2inG project extends the work of cognitive scientists and mathematics educators who have previously documented the impact of comparison on students’ learning in algebra, with the goal of transforming the learning that occurs in geometry classrooms. The purpose of this research is two-fold: To design animated mathematics curricular materials for geometry that focus on directly comparing different approaches to solving the same geometry problem, and to examine the effects of these materials on student learning of geometry. 

In this seminar, we will discuss the design of our materials, which cover four 8th grade geometric topics: Angles, Transformations, Pythagorean Theorem, and Volume. These topics are discussed in scenarios of contrasting cases, where two fictional students each present a unique method or solution strategy to the same problem. The goals are for students to analyze both methods and discuss similarities and differences, strengths and weaknesses of each, and to enhance their procedural knowledge and conceptual understanding.

Registration Closed

Duration: 60 minutes

Format: Online seminar via Zoom web meeting software with questions and discussion. Detailed instructions for joining will be emailed to registered participants.


Erin Krupa is an assistant professor of Mathematics Education in the STEM Education Department at North Carolina State University. Her research focuses on improving the quality of mathematics teaching and learning through innovative curricular materials and professional development.

Brianna Bentley began her research career at Appalachian State University during her master’s program, where she studied college students’ understanding of fractions. She is currently pursuing her Ph.D. in Math Education at NC State, where her research interests currently focus on developmental mathematics education.
JP Mannix is pursuing his Ph.D. in Math Education at NC State. His research interests include math anxiety, specifically as it affects teachers at the secondary levels and subsequent student achievement. Other areas of interest include non-Euclidean geometries and proof at the secondary level.