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The Queen’s Dilemma

Katherine Brown
2nd grade
Bethlehem Elementary School
Barrow County Schools

Contents

Task
Overview
In this task, students will use arrays to solve multiplication problems.

Illustrative Task
The queen of the Bethlehem Ant Colony has 16 ants in her army. She doesn't always need all the soldiers to march in the parades. Sometimes she is trying to find some other group sizes of soldiers that can march evenly without having any soldiers left over. (She doesn't want them to march in single file, and she must have at least four in the parade.) Use the manipulatives to experiment with different amounts of ants to find how many possible ways the queen could arrange the soldiers. Use the chart to record your results.

GPS Addressed
M2N3. Students will understand multiplication, multiply numbers, and verify results.
    b. Use repeated addition, arrays, and counting by multiples (skip counting) to correctly multiply 1-digit numbers and construct the multiplication table.

Video Information
Use these questions to guide your thinking about some of the important teacher ideas in the lesson featured in the video clip.
  1. What kinds of questions does the teacher ask to promote students’ problem solving?
  2. How is the teacher gauging students’ current understandings and building from those understandings?
  3. Consider the GPS standards listed with this video.
  4. What makes this lesson different from lessons you have taught on this topic?

Classroom Materials

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