This open-ended interactive Flash applet helps students develop operation and number sense, facility with number facts, and understanding of equations. Users designate single-digit whole numbers or integers and operations on both sides of an equation and test for balance. Users can enter numbers by using the keyboard or arrow buttons or by dragging number tiles. Each element can be hidden and a seesaw may be toggled on/off. Teachers may use this applet to lead instruction, or students may use it independently to perform specific investigations or explore freely. Supplementary documents include Objectives, containing teaching suggestions, and a student recording sheet.


  • Mathematics > General
  • Education > General

Education Levels:

  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Grade 5
  • Grade 6
  • Grade 7
  • Grade 8
  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12


Grade 2,Grade 3,Grade 1,Make use of structure,NSDL,Grade 4,Grade 5,Addition,Early Elementary,Mathematics,Number concepts,Social Sciences,Arithmetic,Analyze and persevere,Concept formation,Division,Number and operations,Upper Elementary,Model with mathematics,Subtraction,Multiplication,Composition and decomposition of numbers,Informal Education,Integers,Whole numbers,Middle School,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Comparison of numbers,Practice Standards,Grade 6,Life Science,Elementary School,Reason quantitatively,Chemistry,Operations,Mental calculation,Number sense,Grade 7,Engineering,Process skills,Education,oai:nsdl.org:2200/20140728161236273T



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