Visualize subtraction with this classic Montessori board using red, blue, and natural wooden strips. Ideal for CASA math and homeschool learning.
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Product Description
The Montessori Subtraction Strip Board is a foundational Sensorial Math material used in Casa classrooms to introduce the concept of subtraction through hands-on, visual exploration. This framed wooden board features 18 horizontal rows marked with numbers 1 to 18, where children physically arrange color-coded strips to perform subtraction operations. By manipulating the red, blue, and natural wood strips, learners internalize subtraction as a process of comparison and removal.
Key Features
- Wooden board with 18 clearly defined rows and numbered columns from 1–18
- 9 red strips (1–9) to represent the subtrahend
- 9 blue strips (1–9) for control of error and visual clarity
- 18 natural wooden strips (2 sets of 1–9) for difference identification
- Framed board design ensures stability and ease of use on math shelves
Benefits for Children
- Develops foundational subtraction skills through active manipulation
- Strengthens number sense, sequencing, and one-to-one correspondence
- Encourages independent problem-solving and visual self-correction
- Supports the Montessori math curriculum in Casa classrooms
- Prepares children for abstract subtraction and future math concepts
What’s Included
- 1 wooden subtraction strip board with 18 rows and columns labeled 1–18
- 9 red wooden strips (1–9)
- 9 blue wooden strips (1–9)
- 18 natural wooden strips (2 sets of 1–9)
Specifications
- Recommended Age: 4–6 years
- Material: Solid wood with non-toxic paint and finish
- Board Dimensions: Standard Casa-compatible size
- Alignment: Follows AMI Montessori mathematics sequence
How to Use
Present the child with a subtraction problem (e.g., 12 – 7). Have the child place a red strip representing 7 on the board starting at 1. Then, using a natural wooden strip, the child fills the remaining space to reach 12. The number on the natural strip represents the difference. Through repeated use, children begin to memorize subtraction facts and recognize number relationships. Self-correction is built in through spatial awareness and visual tracking along the board.