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## Problem solving with the Sneetches

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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## Relational Thinking: What's the Difference?

Instructional activities designed to encourage relational thinking in primary-grades classrooms can give students advantages when they reason about subtraction.

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## Finding math in reading and science

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.

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## Selecting and Sequencing Students' Solution Strategies

For orchestrating whole-class discussions, note these suggestions to fine tune problem-solving techniques into cognitively challenging tasks.

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## Is there an app for that?

This regular department of the journal 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. Perhaps thinking of the more than fifty national food days that are celebrated in the month of October has tickled your students' taste buds enough to work up an appetite with these word problems and learn about all the foods that our nation celebrates this month.

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## Solutions: Hundred Chart Challenge

Each month, this section of the Problem Solvers department showcases students' in-depth thinking and discusses the classroom results of using problems presented in previous issues of Teaching Children Mathematics. In this month's Problem Solvers Solutions, readers have a window into students' number and operation sense in the early elementary grades. Second and third graders were presented with problem-solving tasks using a hundred chart consisting of two number cards and a challenge card aligned to an addition or subtraction structure. Drawing on the structure of the hundred chart and prior knowledge, students were able to articulate their solution strategies.

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## The Power of Pets

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 presents mathematics word problems for students focused around the theme of pets. Solving these problems can help students apply mathematical thinking to authentic problems related to an interesting topic.

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## Problem: The Cycling Shop

This article introduces a task designed around SMP 2: Reason abstractly and quantitatively and encourages students to move between decontextualizing and contextualizing as they work toward solutions. Each month, elementary school teachers are presented with a problem along with suggested instructional notes and asked to use the problem in their own classrooms and report solutions, strategies, reflections, and misconceptions to the journal audience.

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## Solutions: How Much Do the Tiles Cost?

Each month, this section of the Problem Solvers department showcases students' in-depth thinking and discusses the classroom results of using problems presented in previous issues of Teaching Children Mathematics. In this month's Problem Solvers Solutions, readers gain a window into students' algebraic reasoning in the early elementary school grades. First graders received a design made of square and triangular tiles as well as the total cost of the tiles needed to make the design. By determining the various cost combinations for the square and triangular tiles, students were able to articulate how a change in the cost of the triangular tile affected the cost of the square tile.

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## Clocks: For more than telling time

Postscript items are designed as rich “grab-and-go” resources that any teacher can quickly incorporate into their classroom repertoire with little effort and maximum impact. In this article, classroom clocks are used as an effective tool to support student understanding of basic number, fraction, and geometry concepts.