 This Math lesson is designed for 3 to 6-year-old children. It introduces the child to the algebraic formulas and helps them learn the different mathematical concepts using a trinomial cube.

## What is a trinomial cube?

The trinomial cubes are color-coded 3D blocks that represent the algebraic trinomial formula. The cube is made up of 27 wooden blocks of different sizes. These blocks fit together to form a cube and represent the cube (a + b + c).

It is similar to the Binomial Cube lesson where the child assembles the cube by putting together blocks to form the cube printed on the lid.

### A Trinomial cube box consists of

1. Three wooden cubes: red, blue, and yellow
2. Eighteen rectangular prisms
• 3 red and black prism with the same height as the blue cube
• 3 red and black prism with the same height as the yellow cube
• 3 yellow and black prism with the same height as the red cube
• 3 yellow and black prism with the same height as the blue cube
• Blue and black prism with the same height as the yellow cube
• 3 blue and black prism with the same height as the red cub
• 3 Six black rectangular prism

All the pieces when assembled form a cube of (a+b+c). The cube of the trinomial is printed on the lid

## Benefits of using Trinomial cube

• To prepare the child to learn advanced mathematical concepts.
• To refine dexterity and visual acuity.
• To provide concrete and visual exposure to the algebraic concepts.
• To provide a conceptual understanding of numbers and formulas.
• It helps in developing fine motor skills, order, concentration, and hand-eye coordination.

## How to introduce a Trinomial Cube to a child?

1. Invite the child to the table and tell them, today we are going to learn what a trinomial cube is and how to find the cube of a trinomial.
2. Remove the lid of the trinomial cube box and place it on the table facing up.
3. Open one side of the box and gently remove all the blocks from the box one at a time.
4. Sort the blocks by color order. Make sure to leave space so that all the colors are visible.
5. Tell the child to build the cube using the box’s lid
6. Begin with the red block and place it on the red color block on the box’s lid
7. Find a matching color prism and place it in the correct spot.
8. Repeat placing the color cubes one by one. (Note: The top pattern should match the lid of the box).
9. Place a hand on the first level to show the child it’s flat.
10. Now, tell the child to move this layer into the box.
11. Once the first level is placed in the box, begin the second level and third level on top, using the box’s lid as a reference.
12. Again, when the second layer is complete, ask the child to move it into the box.
13. Similarly, when the third layer is complete, ask the child to move it into the box.
14. Close the sides of the box and close the lid.
15. Ask the child to repeat the activity.

Invite the child to arrange the blocks together to form the cube of a trinomial as shown in the video and help them develop a strong foundation of math and logical concepts.

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Video Created by: Joanne Shango

Tags

• English
• Math
• primary