Montessori AMI Primary Guide
Home Page InfoMontessori Practical Life Sensorial Language Mathematics Videos Store Forum
Three Period Lesson
Memory Games
Visual Sense
  Cylinder Blocks
  Pink Tower
  Brown Stairs
  Red Rods
  Color Tablets
  Geometric Cabinet
  Constructive Triangles
    Rectangular Triangles
    Blue Rectangular Box
    Triangular Box
    Large Hexagonal Box
    Small Hexagonal Box
  Geometrical Figures
  Sensorial Decanomial
  Knobless Cylinders
  Binomial Cube
  Trinomial Cube
  Leaf Cabinet
Tactile Sense
  Sensitizing Fingertips
  Touch Boards
  Touch Tablets
Baric Sense
  Baric Tablets
Thermic Sense
  Thermic Bottles
  Thermic Tablets
Auditory Sense
  Sound Boxes
Olfactory Sense
  Smelling Jars
Gustatory Sense
  Tasting Bottles
Stereognostic Sense
  Geometric Solids
  Sorting Trays
  Mystery Bag
  Sandpaper Globe
  Painted Globe
  Puzzle Maps
    The World
    The Continents
    The Country

Geometric Solids


- A basket large enough to contain ten geometric wooden solids in blue:

        • A triangular prism
        • A rectangular prism
        • A cube
        • A cylinder
        • A cone
        • A triangular pyramid
        • A square pyramid
        • A sphere
        • An ellipsoid
        • An ovoid

- Seven white cards with geometric figures drawn in a thin blue line
- A suitable cloth (not transparent) large enough to cover the basket
- A mat




















Invite the child to come and work with you. Tell the child that for today’s work, we are going to need a mat. Have the child unroll a mat. Bring him over to the shelf and show him the basket, giving the child the name of the material. Have him bring over the entire basket, placing it in the top right corner of the mat. Have the child sit your left.

Procedure 1
- Take out one of the simpler shapes (such as the sphere), and place it on the mat in front of you.
- Feel the solid in your hands by gently sliding you hands around the sphere.
- Allow the child to feel the sphere in the same gentle manner.
- Have the child place the sphere near the top left corner of the mat.
- Demonstrate on another solid, showing him again how to gently slide your hands around the solid.
- Allow the child to explore the other solids in the basket.

Procedure 2
(Prepare for the lesson in the same way as above.)
- Take out the sphere from the basket.
- Feel the sphere in your hands as in Presentation 1.
- Allow the child to feel the sphere and as he is doing so say, “That is a sphere”.
- Ask the child, “Can you put the sphere on the mat?”
- The child should then place the sphere on the mat.
- Take out the cube and repeat in the same way as with the sphere.
- Take out the cylinder and repeat in the same way as above.








- Then do a three-period lesson for: sphere, cube, and cylinder.
- On another occasion, repeat this presentation for three more solids until the child knows that names of all of the solids.


Exercise 1
The child works individually with the geometric solids.

Exercise 2
The child chooses 3 – 4 solids. Place these in a separate basket and cover it with a scarf. Reach your hand under the scarf, feel one of the solids underneath, and say out loud what solid you believe you have in your hands. Take out the solid from under the scarf to reveal the solid you have. Allow the child to do as you have shown. This allows the names of the solids to be reinforced for the child. Work in this manner until the child can place a scarf over all of the solids and still feel and guess correctly.

Exercise 3
Take out three cards of contrast. Place the cards on the mat and see what solids fit onto each card. Allow the child to experiment with all of the cards.






































Exercise 4
In a tray of sand, gently roll one shape at a time to see what forms it can make.


Loud and Soft
The positives, comparatives, and superlatives.


To refine the stereognostic sense.
To make the child aware of the solid shapes that surrounds him.

Preparation for geometry.

Control of Error

3 1/2 years onwards

Questions, Comments ?

Share your experiences in the Forum

Send Lesson to a Friend:

Home Page InfoMontessori Practical Life Sensorial Language Mathematics Videos Store Forum
Montessori Primary Guide

Contact Us