Montessori Wooden Number Height Blocks – Self-Correcting Math Learning SetMontessori Wooden Number Blocks for Early Math Learning Help children build a strong math foundation with these Montessori Wooden Number Height Blocks. Designed to match the height of each number to its mathematical value, this hands on learning set teaches number sense, addition, subtraction, and place value through visual and tactile play. Every block is crafted from natural beechwood and sized so that the height of 7 equals the combined height of 3