Resources and Tools for Elementary Math Specialists and Teachers
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Estimator Four

This interactive applet for two players helps develop estimation skills. As in the game Connect Four, each player tries to connect four game pieces in a row (horizontally, vertically, or diagonally) before the opponent does. Players earn game pieces by estimating the answers to displayed problems according to the user-set tolerance for accuracy. Users may choose the type of problems (addition, multiplication, and/or percentage) and the difficulty level. The game may be played with no time limit, or with a limit set by the users.
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Contributed by: Shodor Education Foundation, Inc., Publisher
Math TopicNumber Sense, Basic Operations, Number Concepts, Mathematical Processes
Grade Level3, 4, 5, 6+
Resource TypeActivity, Game, Interactive Media

  • Additional Information
    • AudienceLearner
    • LanguageEnglish (USA)
    • Education Topic
    • Interdisciplinary Connection
    • Professional DevelopmentNo
    • ContributorShodor Education Foundation, Inc., Publisher
    • Publication Date2011
    • RightsCreative Commons Attribution-NonCommercial 3.0 Unported License
      http://www.shodor.org/interactivate/licensing
    • AccessFree access
  • Standards
    • Common Core State Standards for Mathematics

      Select a standards document: