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Manouchehri Azita, Ozturk Ayse and Sanjari Azin

In this article we illustrate how one teacher used PhET cannonball simulation as an instructional tool to improve students' algebraic reasoning in a fifth grade classroom. Three instructional phases effective to implementation of simulation included: Free play, Structured inquiry and, Synthesizing ideas.

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Zachary A. Stepp

“It's a YouTube World” (Schaffhauser, 2017), and educators are using digital tools to enhance student learning now more than ever before. The research question scholars need to explore is “what makes an effective instructional video?”.

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Colleen Haberern

Students used a pinch of this (a 3D printer and geometry software) and a cup of that (various volume formulas) to complete a tiered task.

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Stephan Pelikan, Anna F. DeJarnete and Stephen Phelps

A monthly set of problems is aimed at a variety of ability levels.

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David A. Yopp and Jacob L. Ellsworth

Learn why generalizing is important but that overgeneralizing can be problematic.

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E. Fanny Sosenke and Tala Councilman

A real-world problem about the cost of moving one's household from one city to another.

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James Russo and Toby Russo

Math by the Month features collections of short activities focused on a monthly theme. These articles aim for an inquiry or problem-solving orientation that includes four activities each for grade bands K–2, 3–4, and 5–6. In this issue, teachers read the classic Dr. Seuss book The Sneetches and other stories with their class and get students to engage with these associated mathematical problems. The problems, many of which are open-ended or contain multiple solutions or solution pathways, cover a range of mathematical concepts.

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Kasandra Dickman and Laura Bofferding

This department explores a game used to help students learn about additive inverses, or “zero pairs.” Authors describe some common reasoning that students used while playing the game and provide activity sheets geared toward students in grades 5–7.

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Frieda Parker and Vida Treviño

This activity engages students in a lesson about algebraic relationships concerning groupings of hamburgers and French fries, coupled with full-page activity sheets.

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Lisa Brooks

Math by the Month features collections of short activities focused on a monthly theme. These articles aim for an inquiry or problem-solving orientation that includes four activities each for grade bands K–2, 3–4, and 5–6. This month's article considers one way to teach children to be lifelong learners: by applying problem-solving skills and a variety of math concepts at home, including time, measurement, basic operations, and fractions.