This article presents an original puzzle that supports students’ development of visual thinking and geometry ideas based on the Van Hiele levels of geometric thought.
Construct It! Triangle Puzzle Challenges
Model It! Building and Sustaining Cultural Traditions with Ethnomodeling
Siddhi Desai and Farshid Safi
This geometric transformation-focused ethnomodeling respects individual and collective community experiences and moves toward educational experiences that acknowledge and celebrate the multidimensional aspects related to identity.
Exploring Geometry with Origami One-Cut-Heart
Lauren R. Holden, Yi-Yin (Winnie) Ko, Devon W. Maxwell, Connor A. Goodwin, Cheng-Hsien Lee, Jennifer E. Runge, and Elizabeth B. Beeman
One-Straight-Cut-Heart activities can help teachers support students’ engagement with geometry and can deepen students’ geometric reasoning.
Understanding Similarity through Dilations of Nonstandard Shapes
Marina Basu, Karen Koellner, Jennifer K. Jacobs, and Nanette Seago
This set of tasks progressively engages students in geometric proportional reasoning.
GPS: Congruency through Superposition
Michelle T. Chamberlin and Robert A. Powers
Growing Problem Solvers provides four original, related, classroom-ready mathematical tasks, one for each grade band. Together, these tasks illustrate the trajectory of learners’ growth as problem solvers across their years of school mathematics.
Graphing Technology Helps Narrow the Digital Divide
Maria de Hoyos
To ensure that technology use benefits all students, it must be accessible with respect to cost and ease of use. Moreover, technology needs to be integrated by considering it from the perspective of the curriculum.
Geometric Reflections: Why Should They Not Be Just a Flip?
Dawn Teuscher, Shannon Dingman, Travis A. Olson, and Lisa A. Kasmer
Using descriptions from popular textbooks, the authors share the importance of introducing the definition so students can make sense of reflections both on and off the coordinate grid.
Asked & Answered
Each month Asked & Answered highlights selected threads from the MyNCTM community. MyNCTM is an online community where NCTM members can ask questions, start and join discussions, and interact with education experts. We encourage you to join the conversation at https://my.nctm.org.
NCTM Leadership Then and Now
Trena L. Wilkerson
How has NCTM leadership shaped the evolution of teaching and learning mathematics? What are your expectations for NCTM leadership?
Asked & Answered
The Asked & Answered department shares excerpts from discussion threads on the online MyNCTM community. In this issue, featured threads highlight responses to members' questions related to mathematical depth in preschool, spiral review in the upper elementary grades, ideas for differentiation in middle school, and projects for high school algebra.