Which of the following teaching-learning resources in mathematics cannot be used for visually challenged students ?

Correct Answer: GeoGebra

Explanation:

Teaching-learning materials (TLMs) in mathematics for visually challenged students should rely heavily on tactile (touch-based) and auditory (sound-based) experiences rather than purely visual representations.

Let's analyze the given options:

1. GeoGebra: GeoGebra is a dynamic mathematics software for learning and teaching arithmetic, geometry, algebra, and calculus. It relies heavily on visual screen interactions, graphs, and figures, making it unsuitable or inaccessible for visually challenged students without specialized software modifications.

2. Taylor’s abacus: A tactile device specifically designed for visually impaired individuals to perform mathematical calculations using mathematical types/pegs.

3. Tiles: Physical, tactile objects that students can feel and manipulate to understand concepts like area, perimeter, fractions, and patterns.

4. GeoBoard: A physical wooden or plastic board with pegs and rubber bands, allowing visually challenged students to touch and feel geometric shapes and spatial relationships.

Therefore, GeoGebra cannot be effectively used as a tactile teaching-learning resource for visually challenged students.