This interactive Java learning tool, which was constructed using the cross-platform open educational resource GeoGebra, allows a teacher to demonstrate and explore integer operations with students using two different balloons and sandbags models. Drag balloons, sandbags, and/or zero pairs onto the board and students see how the total result shown on the board changes the models. Nine pre-set integer addition and subtraction problems are given, as well as the ability to create your own problems (option 10). An alert is given when the first term of each expression is formed. (The models can also be used during discussions of multiplication and division, although no problems are included.)


  • 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


Make use of structure,NSDL,Grade 5,Addition,oai:nsdl.org:2200/20140728160536624T,Express regularity,Representation,Number concepts,Social Sciences,Arithmetic,Concept formation,Process skills,Number and operations,Visual representation,Algebra,Model with mathematics,Subtraction,Integers,Middle School,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Instructional materials,Practice Standards,Grade 6,Elementary School,Reason quantitatively,Algebraic thinking,Operations,Mental calculation,Upper Elementary,Algebraic representation,Mathematics,Engineering,Vocational/Professional Development Education,Expressions,Education



Access Privileges:

Public - Available to anyone

License Deed:

Creative Commons Attribution Non-Commercial Share Alike


This resource has not yet been aligned.
Curriki Rating
'NR' - This resource has not been rated
'NR' - This resource has not been rated

This resource has not yet been reviewed.

Not Rated Yet.

Non-profit Tax ID # 203478467