Resources and Tools for Elementary Math Specialists and Teachers
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Inventing Negative Numbers

In this quick time video segment from Cyberchase, viewers learn about extending a vertical number line below zero as they watch the CyberSquad rescue the Cyberspace Council, which is being held captive by Hacker in a tall building. This video is also featured in the lesson plan: "Introducing Negative Numbers" (cataloged separately). Teaching Tips and a transcript are included.
Contributed by:, Publisher
Math TopicNumber Sense, Number Concepts, Mathematical Practices, Mathematical Processes
Grade Level4, 5, 6+
Resource TypeVideo

  • Additional Information
    • AudienceEducator, Learner
    • LanguageEnglish (USA)
    • Education Topic
    • Interdisciplinary Connection
    • Professional DevelopmentNo
    •, Publisher
    • Publication Date2008-10-10
    • RightsCopyright (c) 2001, 2002, Thirteen/WNET New York.
    • AccessFree access
  • Standards
    • Common Core State Standards for Mathematics

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