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Stefanie D. Livers, Kristin E. Harbour, and Lindsey Fowler

In our attempts to make a concept easier, we may hinder student learning.

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Candace Joswick, Douglas H. Clements, Julie Sarama, Holland W. Banse, and Crystal A. Day-Hess

Modify activities according to these principles and suggestions.

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Megan H. Wickstrom, Elizabeth Fulton, and Dacia Lackey

Use those multicolored linking bricks to help students connect measurement with an understanding of number and operations as well as fractions.

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Caroline B. Ebby, Elizabeth T. Hulbert, and Nicole Fletcher

Dig deeper into classroom artifacts using research-based learning progressions to enhance your analysis and response to student work, even when most students solve a problem correctly.

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Brandy Crowley and Tracy Harper

What is the most exciting day of the school year? Field trip day! Organizing a smooth field trip requires mathematical thinking. After solving these problems, have students create math questions about their own field-trip experiences.

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Ryan Higgins and John Byrd

Redesign well-known playground games, such as hopscotch, to connect physical movement with mathematics play. Postscript items are designed as rich grab-and-go resources that any teacher can quickly incorporate into his or her classroom repertoire with little effort and maximum impact.

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Michelle Stephan and Jennifer Smith

To incorporate more classroom discussion, allow students to argue.

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Cathy M. Chaput and Beth Smith

Introducing a problem to children is always exciting when your goal is to challenge them in more than one way. The Base-Ten Block Challenge, published in TCM's January/February 2018 issue, has two layers to the activity. Conceptually, it has the challenge of using familiar materials more flexibly. In addition, this problem incorporates the strategy of Complex Instruction (CI), which aims to make group participation more equitable for all members through using random grouping and tasks with multiple entry points as well as ensuring that all students are accountable for understanding (Featherstone et al. 2011). A grade 2 class in Guelph, Ontario, Canada, took on this challenge, facilitated by a program coordinator in collaboration with their classroom teacher, Mrs. Beth Smith.

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Debra Rawlins, Natasha Hernandez, and William Miller

Second graders move from counting by ones to counting equal groups to structuring arrays.

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Annette Ricks Leitze, Stephanie Hodge, Danielle Houser, and Clint Mathews

Animals that are at risk of becoming extinct are called endangered species. They can be very large animals, like a polar bear, or very small, like a monarch butterfly. Learn about several different endangered species by engaging in these math activities.