Saturday 30 November 2013


Montessori Activity: Constructive Triangles - Blue Rectangular Box

Age: From 4 years old

1. To construct all possible shapes by sliding and flipping only 2 triangles.

2. To prepare the child for geometry.

1. The Montessori Blue Rectangular Box
2. 1 mat

1. Show where the blue rectangular box is kept and bring it to the mat.
2. Take 2 triangles out and make a shape, saying "Let's make a shape using these 2 triangles."
3. Slide 1 triangle against the edges of the other and see the shapes formed.
4. Name the shapes created one by one.
5. Encourage your child to try.

1. Flipping over one of the pairs to make new shapes.

Video Demonstration:

If the child shows interest, name the shape formed: square, rectangle, parallelogram, rhombus (4 equal lengths) and trapezoid.

Additional Information:
J tried this for the first time on 8 Dec. 2013 (4Y9M3D). He refused to slide the triangles, preferrbly to make his own shapes and patterns with them. Arrgghhh... some days are like that!

Basic Montessori Learning Activities for Under-Fives by David Gettman

You can find the Montessori rectangular box from amazon:

8 Dec. 2013 (4Y9M3D) - J made a person with the triangle - head, upper body, lower body and two triangles as legs

J refused to slide the triangles to make different shapes, preferring to play with it his own way

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