A geoboard is a mathematical manipulative used to explore basic concepts in plane geometry such as perimeter, area and the characteristics of triangles and other polygons. It consists of a physical board with a certain number of nails half driven in, around which are wrapped geo bands that are made of rubber.
Presents geometry exercises with easy-to-follow guidelines and provides over one thousand problems in numerous geometric topics, including quadratic equations, area and perimeter, and coordinate geometry.