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        Grades

        4-7

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        Part of Cyberchase
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        Measuring Object Length on a Number Line

        Students learn to measure from the zero mark and are taught to measure objects that are not aligned with the zero mark by creating a number sentence using subtraction.

        Lesson Summary

        Overview

        In this Cyberchase activity, students watch a video clip in which a square is measured incorrectly by starting from the 1 inch mark. After students learn to measure from the 0 mark, they are taught to measure objects that are not aligned with 0 by creating a number sentence using subtraction.

        Grade Level:

        4-7

        Suggested Time

        1 hour

        Media Resources

        The Measurement Debate QuickTime Video

        Materials

        Handout : "Measuring Objects"
        Assessment: Level A
        Assessment: Level B
        Answer Key

        The Lesson

        Part I: Learning Activity

        1. Read the following to your students: "In this Cyberchase episode, when the Hacker convinces Mr. Zero to leave Gollywood, the number 0 disappears from the city. Britney and Mary-Pat, two twin movie stars, are about to place their handprints on the walk of fame, but they have a disagreement about the size of their squares. Watch the video clip to see how the absence of 0 leads to a misunderstanding and pay attention to how the CyberSquad resolves the problem."

        2. Play the The Measurement Debate QuickTime Video .

        3. Distribute Handout : "Measuring Objects" .

        4. Discuss the handout.

        Part II: Assessment

        Assessment: Level A (proficiency): Students practice measuring objects from zero, and some that do not start from zero, with lengths and positions that include quarters and halves.

        Assessment: Level B (above proficiency): Students practice measuring objects with lengths and positions that include eighths, quarters, and halves.

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