Description

The Seguin’s Boards 10 to 19 (commonly referred to as Seguin Board A or the Teen Boards) is a fundamental Montessori Mathematics material designed to connect quantity with symbol for numbers 11 through 19. By sliding individual unit number cards into fixed frames printed with the number "10", children physically witness how a teen number is formed by adding units to a ten ($10 + 1 = 11$, $10 + 2 = 12$, etc.).Key Benefits & Learning OutcomesUnderstanding Teen Number Structure: Demonstrates that numbers 11 through 19 are not isolated arbitrary symbols, but rather a constant base of 10 combined with growing single units (1 through 9).Isolation of Place Value: Physically shows the zero in "10" being covered by a unit digit card, laying the foundation for expanded form and multi-digit place value understanding.Language & Symbol Association: Connects the sequence of written symbols ($11$ to $19$) with their spoken names, bridging the gap between counting single items and understanding two-digit numeration.Pairs with Concrete Quantities: Designed to be used alongside the Golden Ten Bars and the Colored Short Bead Stair (1–9), allowing children to build the exact bead quantities next to each sliding card.Design & MaterialsIncluded Components:2 Wooden Frames: Long slotted hardwood boards divided into 9 sections, each printed with the numeral 10 in black.9 Wooden Numeral Cards: Printed with single digits 1 through 9 engineered to slide smoothly into the tracks over the zero of each "10".1 Storage Box: Compartmentalized wooden container to keep the frames and digit inserts organized.Material: Smooth natural hardwood with durable non-toxic sealants and high-contrast, black screen-printed numerals.Features: Built-in wooden tracks keep the number tiles aligned so they slide directly over the zero position, ensuring clean spatial alignment during tabletop or work-mat practice.