Constructive Triangles - Rectangular Box
From Montessori Album
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| Constructive Triangles - Rectangular Box | |
|---|---|
| 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: 23 January 2022
| Set of 5 Constructive Triangle Boxes | |
|---|---|
| Store | Price |
| Absorbent Minds | £68.99 GBP |
| Adena | $88.95 |
| Affordable Montessori | $129.00 |
| Affordable Montessori | $76.00 |
| Alison's | $165.48 |
| Bruins | $300.00 |
| E & O | $150.30 |
| Hello Wood | $328.00 |
| Kid Advance | $94.99 |
| Leader Joy | $99.95 |
| Materials Co. of Boston | $230.00 |
| Montessori Concepts | $100.00 |
| Montessori Outlet | $98.95 |
| Neinhuis | $299.00 |
| Thinkamajigs | $129.95 |
| Blue Triangles Box | |
|---|---|
| Store | Price |
| Absorbent Minds | £10.99 GBP |
| Adena | $18.69 |
| Affordable Montessori | $20.00 |
| Alison's | $45.00 |
| Bruins | $47.00 |
| E & O | $21.60 |
| Kid Advance | $18.99 |
| Leader Joy | $20.95 |
| Materials Co. of Boston | $31.00 |
| Montessori Concepts | $18.00 |
| Montessori N' Such | $26.00 |
| Montessori Outlet | $18.95 |
| Nienhuis | $62.00 |
| Thinkamajigs | $22.95 |
Further Reading
- Basic Montessori: Learning Activities for Under-fives by David Gettman, pages 88-90
