- Geoboard
A geoboard is a mathematical manipulative often used to explore basic concepts in
plane geometry such asperimeter ,area or the characteristics oftriangle s and otherpolygon s. Consisting of a physical board with a certain number of nails half driven in, in a symmetrical square five-by-five array, students are encouraged to placerubber band s around the pegs to model various geometric concepts or to solve other mathematical puzzles. Two-dimensional representations of the geoboard may be applied to ordinary paper usingrubber stamp s or special "geoboard paper" with diagrams of geoboards may be used to help capture a student's explanations of the concept they have discovered or illustrated on the geoboard.Geoboards were invented and popularized by Egyptian mathematician
Caleb Gattegno in the 1950s.External links
* [http://homepage.mac.com/efithian/Geometry/Activity-03.html Various geoboard activities]
* [http://standards.nctm.org/document/eexamples/chap4/4.2/index.htm Virtual geoboard on the NCTM web site in the United States]
* [http://mathforum.org/trscavo/geoboards/ Tom Scavo's collection of geoboard activities]
* [http://www.etacuisenaire.com/search/searchdisplay?type=keyword&query=geoboard&x=0&y=0 Educational manipulatives & supplemental materials for grades PreK-12.]
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