A visual mathematical tool consisting of a rectangular frame divided into two rows of five squares, designed to support the development of number sense in young learners. Counters, such as circles or dots, are placed within the frame to represent numbers, facilitating understanding of quantity, counting, and basic arithmetic operations. For example, a number can be represented by placing the corresponding number of counters within the frame.
This specific tool is beneficial due to its capacity to make abstract mathematical concepts more concrete and accessible. It aids in visualizing numbers to ten, supporting subitizing skills (instant recognition of quantity), and promoting mental math strategies. Its origins are linked to efforts to provide hands-on, manipulative-based learning experiences in early mathematics education, enhancing conceptual understanding beyond rote memorization.