Stamp Game

The stamp game is the bridge between the concrete golden beads and fully abstract paper computation. The child still sees the decimal hierarchy through color, but each stamp is the same small size — a first step into symbolic thinking. The stamps must always total what the written calculation says, so any discrepancy invites recount.

• Framework: Montessori
• Unit: Mathematics
• Learning area: Decimal Operations
• Level: Ages 6-7

Objectives

• Perform addition, subtraction, multiplication, and division in the decimal system
• Use color-coded 'stamps' as abstract place-value units
• Transition from the bulk of golden beads toward pure numeral work
• Record operations on paper in parallel with the stamps

Materials

• Wooden box of colored stamps: green '1', blue '10', red '100', green '1000'
• Colored counters for multiplication and division
• Paper and colored pencils (green, blue, red)
• Felt mat

Instructions

1. Present a static addition first (no exchanges). 2. Write the two addends in a column on paper, using green, blue, and red to color each digit by category. 3. Lay out the first addend with stamps, then the second beneath it. 4. Combine by sliding all the units, then all the tens, then all the hundreds together. 5. Count the combined stamps by category and write the sum. 6. Move to dynamic addition: ten units become one ten stamp, etc. 7. Extend over weeks to dynamic subtraction. 8. Introduce short and long multiplication with colored counters. 9. Introduce short and long division with colored dividers.

Educator tip

Always tie paper to stamps at this stage. The written record and the material must speak the same language — otherwise the child may memorize procedures without meaning.

Assessment

Observe fluency with exchanges, accuracy of written records, and progressive independence from the stamps.

More from Mathematics

• Checkerboard for Long Multiplication
• Racks and Tubes: Long Division
• Hundred Board
• Addition Strip Board
• Subtraction Strip Board
• Multiplication Bead Bars
• Division with Bowls and Beads
• Introduction to Fractions — The Fraction Circles