The Seguin Board A is a powerful Montessori material that helps children move from concrete counting to a deeper understanding of numbers 11 to 19. In this video, we explore how the Seguin Board A supports number sense, place value, and confidence in early mathematics. You’ll see how this hands-on material allows children to build numbers, see patterns, and truly understand what numbers represent—laying a strong foundation for future math learning the Montessori way.