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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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## Beware of “Gaps” in Students’ Fraction Conceptions

Many students have a dominant part-whole conception of fractions. We examine why this is problematic and explore strategies to move students beyond this limitation.

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## Building Algebraic Procedures From Concepts: Like Terms

This task sequence for adding and subtracting like terms—grounded in the concepts of equivalence and algebra as generalized arithmetic—helps students see connections between concepts and procedures in algebra.

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## Hyperbolic Duckies

Modeling exponential growth with crochet.

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## GPS: Good Measures

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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## Let’s Give Them Something to Talk About

Different types of open tasks can be used as a tool to promote rigorous student mathematical discourse and considerations for facilitation.

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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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## Reconsidering Mathematical Authority

Who has mathematical authority in your classroom, and what does authority look like? Find out different ways you can help students gain authority.

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## Build It! Imagining Integers

Support imagination in your mathematics classroom with negative integers.

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## Build It! The Rectangle Game

Discover technology-enhanced, game-based tasks and student generalizations.