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Exploring Lunar Phases With the Moon Pie ­Simulation

Amanda Provost and Nicole Panorkou

Students use multiplicative and ratio reasoning with fraction and degree values as they explore a simulation of the lunar phases.

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Integrating Integers with Tug-of-War and Two-Sided Counters

Kristyn Sartin

An introduction to integer addition and subtraction in a conceptual 
and relatable way using two-sided counters and tug-of-war.

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Construct It! Introducing Integers with Floats and Anchors

Christy Pettis and Aran Glancy

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