The Seguin Boards (C 070) are a foundational math material for the Primary classroom, designed to help children bridge the transition from counting the teen and ten quantities to reading and writing the numerals 11 through 99. Used in sequence with the Golden Beads and the Short and Long Chains, they give children a concrete and visual anchor for understanding place value in the decimal system. Having a well-maintained set on your math shelf ensures children can revisit this critical numeration work independently and with confidence.