Constructive Triangles - Rectangular Box
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Constructive Triangles - Rectangular Box | |
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Sensorial - Visual Discrimination of Form | |
Level | Primary |
Age | 4 + |
Prerequisites | Geometric Cabinet |
Materials | Rectangular Box of Constructive Triangles |
Use of this material makes the child aware that all polygons can be made with triangles. This activity prepares the child for geometry.
Presentation
- Invite the child to the lesson. Name the work and show them where it is on the shelf.
- Unroll a large mat (or put two smaller mats side by side).
- Take the box of triangles to the mat.
- Lay the triangles so that the ones that go together are in columns.
- Slide down the bottom triangle for the first shape.
- Trace over the black line on it with your index and middle fingers.
- Trace the black line on the corresponding triangle.
- Slide down the second triangle so the black lines meet.
- Do the same with the other shapes.
Points of Interest
Control of Error
The black lines serve as a control of error when constructing the shapes.
Variations and Extensions
Material
Make Your Own
Printable version available to buy here:
Constructive Triangles - $4.50
Where to Buy
Prices and links checked: 31 July 2020
Set of 5 Constructive Triangle Boxes | |
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Store | Price |
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 Co. of Boston | $230.00 |
Montessori N' Such | $80.00 |
Montessori Outlet | $98.95 |
Neinhuis | $299.00 |
Thinkamajigs | $101.96 |
Blue Triangles Box | |
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Store | Price |
Adena | $18.69 |
Alison's | $38.25 |
Bruins | $45.00 |
E & O | $24.00 |
Hello Wood | $53.00 |
Kid Advance | $18.99 |
Leader Joy | $20.95 |
Materials Co. of Boston | $31.00 |
Montessori N' Such | $15.01 |
Montessori Outlet | $18.95 |
Nienhuis | $59.60 |
Thinkamajigs | $15.26 |
Further Reading
- Basic Montessori: Learning Activities for Under-fives by David Gettman, pages 88-90