Sensor 14. The Constructive Triangles: Large Hexagonal Box

Shu-Chen Yen's On-Line Montessori Albums

SENSORIAL-MOTOR ALBUM

14. THE CONSTRUCTIVE TRIANGLES: LARGE HEXAGONAL BOX

MATERIALS:

An hexagonal box containing the following triangles:

1 large equilateral triangle, yellow

6 isosceles obtuse-angled triangles, yellow

2 isosceles obtuse-angled triangles, red

2 isosceles obtuse-angled triangles, gray

PRESENTATION:

1. Bring the box to the rug and mix the triangles on the rug.

2. Tell the child that " I am going to show you how to build hexagons".

3. Pick up one obtuse angle triangle as the control one and find another same triangle.

4. Slide the second triangle into the first one slowly to make a rhombus by matching the black lines.

5. Pick up an obtuse angle triangle and find another one to make a parallelogram.

6. Pick up 1 equilateral triangle, then find other three obtuse angle triangles and slide them slowly into the equilateral triangle to make a hexagon.

7. Pick up one obtuse angle triangle as a control one and then find other two same triangle and matching them as a equilateral triangle.

8. Separate the triangles and let the child do it.

POINT OF INTEREST:

The moment at which the new figures are constructed.

CONTROL OF ERROR:

If the block lines do not match in the newly constructed figures.

DIRECT AIM:

Visual discrimination of form and construction of new forms.

INDIRECT AIM:

Preparation for geometry.

AGE:

3 years.

LANGUAGE:

Rhombus, parallelogram, hexagon (names of the triangles used in constructing these figures if appropriate to age and interest of the child)