Constructive Triangles - Blue Rectangular Box

From Montessori Album
Constructive Triangles -
Blue Rectangular Box
Sensorial - Visual Discrimination of Form
Blue Rectangle Box 1.JPG
LevelPrimary
Age4 +
PrerequisitesGeometric Cabinet
Constructive Triangles - Triangular Box
Constructive Triangles - Rectangular Box
MaterialsBlue Rectangular Box

Use of this material makes the child aware that all polygons can be made with triangles. This activity prepares the child for geometry.

Presentation

  1. Take the material to a large mat. Lay out the triangles on the mat.
    Blue Rectangle Box 1.JPG
  2. Show that the triangles can be combined into other shapes in multiple ways.
    Blue Rectangle Box 2.JPG Blue Rectangle Box 3.JPG

Points of Interest

Control of Error

Variations and Extensions

Material

Make Your Own

Printable version available to buy here:

Where to Buy

Prices and links last checked: 1 June 2020

Set of 5 Constructive Triangle Boxes
(Includes: Rectangular Box, Triangular Box, Blue Rectangular Box, Large Hexagonal Box, Small Hexagonal Box)
Adena $88.95
Alison's $157.60
Bruins $290.00
E & O $145.00
Hello Wood $328.00
Kid Advance $89.99
Leader Joy $99.95
Materials Company of Boston $230.00
Montessori N' Such $80.00
Montessori Outlet $98.95
Neinhuis $299.00
Thinkamajigs $101.96

Blue Triangles Box
Adena $18.69
Alison's $38.25
Bruin's $45.00
E & O $24.00
Hello Wood $53.00
Kid Advance $18.99
Leader Joy $20.95
Materials Company of Boston $31.00
Montessori N' Such $15.01
Montessori Outlet $18.95
Nienhuis $59.60
Thinkamajigs $15.26

Further Reading