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## Construct It! Introducing Integers with Floats and Anchors

Use the Floats and Anchors context as well as physical and digital materials to help students understand integer addition and subtraction.

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## Using Public Records to Scaffold Joint Sense Making

Teachers can more productively use board work to scaffold joint sense making.

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## Bodies in Motion: Exploring Dynamic Angles

The authors describe a fourth-grade lesson that promotes understanding of angle as a dynamic figure through use of a real-world tool used by physical therapists to measure joint motion.

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## Supporting Understanding Using Representations

Three deliberate teaching practices can help students strengthen multiple connections to a unifying concept.

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## Exploring Relative Size with Relative Risk

The Relative Risk Tool web app allows students to compare risks relating to COVID-19 with other more familiar risks, to make multiplicative comparisons, and to interpret them.

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## Using CODAP to Grow Students’ Probabilistic Reasoning

Draw on two simulations to introduce compound events and help your class make connections between experimental and theoretical probabilities.

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## Teaching Is a Journey: A Mathematical Journey to Istanbul

This department provides a space for current and past PK–12 teachers of mathematics to connect with other teachers of mathematics through their stories that lend personal and professional support.

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Using technology to explore a rich task, students must reconcile discrepancies between graphical and analytic solutions. Technological reasons for the discrepancies are discussed.

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## Incorporating Popular Media to Engage Students

Portrayals in popular media offer ways to convey images of the mathematics field as both beautiful and powerful

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## Social and Creative Classrooms

Students use computers outside and inside of math classes and they enjoy them immeasurably more outside of math class. That's because, outside of class, they use their computers in ways that are creative and social. The same can and must be true about computers inside of math class.