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Kerri Richardson and Catherine Stein

Do you find that your students sometimes struggle when communicating their mathematical ideas? Do you believe that developing good spatial sense is important in the mathematics classroom? To jump-start a mathematical conversation among you and your students, complete this exercise: Glance at figure 1a for no longer than three seconds, then draw what you saw. When you are done, look at the image and compare it with your drawing. What did you see? How did you draw it? Ask a colleague to do the same. Did he or she draw the diagram differently? How did you describe the image, and how did your colleague?

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Kerri Richardson, Anne Reynolds and Catherine S. Schwartz

Rich mathematical tasks—here, finding and categorizing the quadrilaterals that can be made with vertices on a 4 × 4 grid—can promote adaptability in any classroom.

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Sarah S. Pratt, Tina M. Lupton and Kerri Richardson

Students can create an image of the measurement model of division as an alternative to the long division algorithm.

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Jessie C. Store, Kerri D. Richardson and Tyrette S. Carter

Try these four growing-pattern strategies to teach algebraic thinking in elementary school.