Geoboard for School Maths Lab

Quick Answer: A Geoboard is a board with pins, usually in a square grid, on which students stretch rubber bands to make shapes. The geoboard is used in primary and middle-school lessons to build polygons, find area by counting squares, work out perimeter and practise symmetry.

Shapes Made, Changed and Remade

The appeal of a pin board is that shapes can be changed in seconds. A pupil makes a rectangle, moves one band to a new pin and has a trapezium, then moves another and has a triangle. Because nothing is drawn, mistakes cost nothing, and pupils try far more shapes than they would on paper. That volume of trying is what builds a feel for properties such as parallel sides, right angles and equal lengths.

Area comes from counting the grid squares a shape encloses. Rectangles are straightforward; right-angled triangles show that half a rectangle means half the squares; and irregular shapes need whole and half squares added together. Perimeter is measured along the grid lines, which leads to a useful discovery: a band that runs diagonally between pins is longer than one grid unit, so shapes with slanted sides cannot have their perimeter found simply by counting.

Symmetry works well in pairs. One pupil makes half a shape on one side of a line of pins, and a partner completes the mirror image. Shapes are then copied onto dotted paper, which gives the teacher a record and helps pupils move from the board to written geometry.

Specifications

Applications

• Making and naming triangles, quadrilaterals and other polygons
• Finding area by counting whole and half squares
• Comparing shapes with the same area but different perimeters
• Completing symmetrical shapes across a line of pins
• Halving a rectangle in different ways to show equal parts

Care & Handling

• Remove rubber bands from each board at the end of a lesson so they do not perish on the pins.
• Teach pupils to stretch bands away from their eyes and let them go slowly.
• Check the pins now and then and straighten or report any that are loose or bent.

Why Choose LabEquip

Primary and middle-school teachers usually buy a board for each pupil or pair, since the value lies in every child making shapes. LabEquip lists it in Mathematics School Lab Products; where circle geometry is also needed, the Double Sided Geoboard adds a second layout. Ask about quantities through the contact page.

Frequently Asked Questions

How is area found on the pin board?

Count the grid squares inside the band. For shapes with slanted sides, count whole squares and pair up the half squares cut by a diagonal. A right-angled triangle covers exactly half the rectangle drawn around it.

Why is perimeter tricky with diagonal bands?

The distance between two pins along a diagonal is longer than the distance between neighbouring pins in a row. So a shape with slanted sides cannot have its perimeter found by counting pin spaces, which is a useful surprise for pupils.

How do pupils practise symmetry on the board?

Put a band along a row of pins as the mirror line. One pupil makes half a shape on one side and a partner makes the reflection on the other side, checking that each corner is the same distance from the line.

How do pupils record their shapes?

They copy each shape onto dotted paper with the same spacing as the pins. The record lets the teacher check work and gives pupils a bridge from the board to written geometry.

How does this geoboard differ from the double-sided and circular ones?

This listing is a single-faced board, usually with a square grid, for shapes, area and perimeter. A double-sided board adds a second layout on the reverse, and a circular board arranges its pins around a circle.

What size is the board and how many pins does it have?

The title does not state these, so confirm the board size and pin grid when you enquire. A larger grid allows bigger shapes and more varied area problems.

Last Updated: September 2026