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## Adapt It! Adapting Stories and Technology for Engagement in Geometry

A task to develop and provide access to mathematics for all.

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## The Do Nothing Machine

The Trammel of Archimedes traces an ellipse as the machine’s lever is rotated. Specific measurements of the machine are used to compare the machine’s actions on GeoGebra with the graph of the ellipse and an ellipse formed by the string method.

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## Using Mathematics to Design a Droid

Teachers have the opportunity to make mathematics relevant. We leveraged the popularity of Star Wars to engage students in exploring and connecting two dimensions and three dimensions to careers in toy design.

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## Algebraic Thinking in the Context of Spatial Visualization

This pattern-related problem, appropriate for high school students, involves spatial visualization, promotes geometric and algebraic thinking, and relies on a no-cost computer software program.

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## Turning Trucks Into a Meaningful Geometry Exploration

Learn how to engage students in geometry concepts through a real-world task that leverages GeoGebra to provide students with generalization and authorship opportunities.

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## Exploring Grades 3–5 Mathematics Activities Found Online

We investigate resources on TeachersPayTeachers and discuss how what is available affects our teaching practices.

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## Developing Skills with Visual Representations

This article describes how visual representations can help develop students’ reasoning and proof skills.

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## A Radian Angle Measure and Light Reflection Activity

During a Desmos activity, students adjust the measures of angles in radians to reposition a laser and a mirror so the beam passes through three stationary targets. The Radian Lasers activity can be extended to simulate project-based learning.

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## Building Powerful Mathematical Thinkers with dINBs

The Teaching for Robust Understanding framework facilitates online collaborative problem solving with digital interactive notebooks that position all students as doers of mathematics.

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## Empowering Latinx Families to Help Children with Mathematics

An innovative program addresses the digital divide with short, engaging videos modeling mathematic activities sent to families through a free mobile app.