# Trinomial Cube

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Trinomial Cube
Sensorial - Visual Discrimination of Form
Level Primary
Age 4 +
Prerequisites Binomial Cube
Materials Trinomial Cube

In this activity the child assembles a three-dimensional puzzle made up of 27 wooden blocks. This puzzle is the physical representation of the trinomial formula: (a+b+c)3. This activity indirectly prepares the child to learn Algebra later on.

## Presentations

### Presentation 1

1. Invite the child to the lesson. Show him where the work is on the shelf, and name the work. Take the Trinomial Cube box to a table.
2. Step two
3. Step three

### Presentation 2

1. Invite the child to take the Trinomial Cube box to a rug or table.
2. Step two
3. Step three
4. Step four
5. Step five
6. Step six

## Control of Error

• The diagrams on the sides of the box remind the child of the pattern that each level of the blocks should make.
• The blocks will not fit back in the box unless the cube in constructed correctly.

## Material

Albanesi \$209.00
Alison's \$59.99
Bruins \$155.00
Bruins \$121.00 (unpainted wood)
Cabdev \$174.00
Caliber \$32.99
Creative Learning \$39.95
E & O \$210.00
Grandpas \$35.00
Hello Wood \$179.00
Juliana Group \$184.80