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Dorothy Y. White

Use this activity to support students in working together, recognizing one another’s contributions, and leveraging their mathematical strengths to solve challenging problems.

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Gabriel T. Matney

To develop second-grade students' confidence and ease, use these three specific types of tasks that align with Common Core State Standards for Mathematics expectations.

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Martha Hildebrandt

This article shares ideas for using the calendar date to increase students' mental mathematics and problem-solving skills. Postscript items are designed as rich grab-and-go resources that any teacher could quickly incorporate into his or her classroom repertoire with little effort and maximum impact.

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Wendy Bray

Flashcards incorporating visual models are presented as a strategy to support mastery of addition, subtraction, and multiplication facts. 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.

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Katherine A. G. Phelps

Fourth- and fifth-grade learners can use differentiated number sets within CGI problem structures to add and subtract fractions with unlike denominators.

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Butterflies are beautiful insects for students to study. Unfortunately, some kinds of butterflies are on the endangered species list because their natural habitats are disappearing. Members of our school community are concerned about this dilemma, so we decided to plant a butterfly garden.

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Temple A. Walkowiak

A talkative second grader helps her teacher describe, extend, and generalize about growing patterns.

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Sharon A. Edwards, Robert W. Maloy, and Gordon Anderson

Learning mathematical problem solving is as easy as 1, 2, 3 when teachers use flexible instructional strategies.

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Carolyn M. Jones

Connecting mathematical thinking to the natural world can be as simple as looking up to the sky. Volunteer bird watchers around the world help scientists gather data about bird populations. Counting all the birds in a large flock is impossible, so reasonable estimates are made using techniques such as those described in this problem scenario. Scientists draw on these estimates to describe trends in the populations of certain species and to identify areas for further research.