Resources and Tools for Elementary Math Specialists and Teachers
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This interactive Java applet allows users to explore estimating numbers of objects, length, and area, by displaying random shapes, lines, or irregular figures on the screen. Options include: three difficulty levels for accuracy; displaying guess history; a hint button; and an optional scoring feature that allows users to keep track of the number correct.
Contributed by: Shodor, Publisher
Math TopicMeasurement, Number Sense, Mathematical Practices, Mathematical Processes
Grade Level2, 3, 4, 5
Resource TypeInteractive Media, Problem Set

  • Additional Information
    • AudienceEducator, Learner
    • LanguageEnglish (USA)
    • Education Topic
    • Interdisciplinary Connection
    • Professional DevelopmentNo
    • ContributorShodor, Publisher
    • Publication Date2002
    • RightsCreative Commons Attribution-NonCommercial 3.0 Unported License
    • AccessFree access
  • Standards
    • Common Core State Standards for Mathematics

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