This interactive Flash applet supports the exploration of numbers to 100 by simulating a 100-bead string. A teacher or child can move all or some beads to the left or right to add and subtract. The controls allow users to move beads individually or 10 at a time to model different counting and calculation strategies. Users can hide or show the numbers represented by the beads. This applet lends itself well to use on an interactive white board. A pdf guide to this collection of teaching applets is cataloged separately.


  • 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,Visualization,Grade 1,NSDL,Addition,Early Elementary,Kindergarten,Visual representation,Mathematics,Number concepts,Arithmetic,Concept formation,Process skills,Number and operations,Subtraction,Life Science,Composition and decomposition of numbers,oai:nsdl.org:2200/20140728160641790T,Informal Education,Whole numbers,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Comparison of numbers,Elementary School,Representation,Chemistry,Operations,Education,Number sense,Vocational/Professional Development Education,Counting



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