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## Delving Deeper: What Else Comes after 1 + 2 = 3?

The simplest of prekindergarten equations, 1 + 2 = 3, is the basis for an investigation involving much of high school mathematics, including triangular numbers, arithmetic sequences, and algebraic proofs.

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## GPS: Interpreting Whole-Number Remainders

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.

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## Using Number Talks to Compare Fractions

Using this strategy, a teacher facilitates a short conversation during which students verbally explain and justify reasoning. We have found that a coordinated series of number talks supports students’ reasoning when comparing fractions.

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## Infusing SEL into the Elementary Mathematics Experience

Returning to in-person learning after COVID-19, our goal was to use our district’s framework along with the CASEL 5 to help us address the social and emotional learning needs of our students without losing the integrity of the mathematics.

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## Keeping Your Finger on the Pulse of SEL

Children analyzed data to read their bodies and manage their emotions. To avoid controlling children’s bodies and emotions, the authors encourage teachers to embrace children’s unanticipated responses.

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## Mathematical Connections: Many Faces of the Truncated Icosahedron

Examine this geometric figure in light of a set of connections among fields such as architecture, geometry, science, sports, technology, and associated uses, models, and discoveries.

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## Problems to Ponder

Problems to Ponder provides 28 varying, classroom-ready mathematics problems that collectively span PK–12, arranged in the order of the grade level. Answers to the problems are available online. Individuals are encouraged to submit a problem or a collection of problems directly to mtlt@nctm.org. If published, the authors of problems will be acknowledged.

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## A Spiritual Turn: Toward Desire-Based Research and Indigenous Futurity in Mathematics Education

The practice of futurity within Indigenous communities has existed since time immemorial, with past, present, and future intertwined and with a focus on (re)membering and healing. As futurity becomes more popular in mainstream venues, it raises questions about how it will affect mathematics education (research). This Commentary makes an argument for desire-based research frameworks and Indigenous futurity praxis as key components of a spiritual turn, somewhat distinct from the sociopolitical turn our field took about a decade ago. I analyze some of the equity issues that arose in the March 2022 issue of JRME, raise three important questions to consider in our research, and offer suggestions so that we may embrace a spiritual turn.

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## Symbiosis: Social and Emotional Learning & Mathematics Learning

Social and Emotional Learning and the Standards for Mathematical Practice have a mutually beneficial relationship and develop mathematically proficient and confident students.

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## Using Fermi Questions to Foster Community

Two teachers describe how to use Fermi Questions to illuminate the connections between the Standards for Mathematical Practice and the social and emotional learning competencies.