The **Montessori Math Stamp Game** lesson comes at the end of Place Value and Decimal System work. The goal is to reinforce the four operations introduced with the Golden Beads but in a more abstract way. I really like **Montessori Math’s Stamp Game**. Children do, too.

The work is familiar to them, but different enough to keep it interesting and intriguing. Montessori Printshop has great, go to download and print, Stamp Game worksheets to accompany the learning for FREE on their website. They also offer FREE Stamp Game instructions and materials.

## Stamp Game Lesson

Invite the child to a lesson with the Stamp Game.

Gather the Presentation Tray and a Stamp Game. Open the lid of stamps and place it under the box:

*“This is the Stamp Game. It works like the Golden Beads, but instead of unit beads we have these unit stamps. Instead of ten bars we have these ten stamps. Instead of hundred squares we have hundred stamps. Instead of thousand cubes we have thousand stamps. Can you give me 5 ten stamps, 4 unit stamps,…?”*

Practice until the child is quick at identifying the stamps.

### Addition – Static

*“Now let’s do some addition. I will write down an equation for you and you can use the stamps to solve it.”*

- Show the child how to line up stamps for the first, then the second addend in vertical columns.
- Slide each column together to the bottom of the work area, count and record.
- Ask the child to summarize his work for you at the end.
- Give any directions needed to guide the child with the equations. Watch the child and then withdraw from the work.

### Addition – Dynamic

The child should be able to move onto this work quickly. Watch her to see if she needs guidance with exchanging ten of one quantity for the next highest quantity. The new stamp goes to the top of its column, and is slid down and added to the two addends when the time comes.

Exchanging 10 unit stamps for a 10 stamp and exchanging 10 ten stamps for a 100 stamp.

### Multiplication – Simple

- Process same as Golden Bead operation.
- Write an equation for the child, have her put out the quantity required in vertical columns. Remind her to start with the units.
- Slide quantities together and to the bottom of work area.
- Count and record answer.

### Multiplication – Dynamic

{Process same as GB operation.}

Exchanging is done exactly as was described for addition.

### Subtraction – Simple

Invite the child to get the appropriate number of stamps for the minuend.

- Have her take away the number of units, tens, hundreds and thousands specified by the subtrahend by counting up from the bottom of the column of stamps.
- These stamps should be removed from the work area by placing to the side.
- Move the remaining stamps to bottom of mat.
- Count and record each category.

### Subtraction – Dynamic

{Process same as GB operation.}

Follow the same procedure as described for golden beads. When exchanging is required, go to next column to borrow a stamp, exchange it, place exchanged stamps in the appropriate column and proceed with subtraction.

### Division – Static

Write an equation for the child and introduce the skittles: *“You can use a skittle for each person you are dividing among. Why do you think the skittles are green? The reason is because they are units. Each skittle represents one person.”*

Have child get out dividend. Arrange the skittles in a vertical row.

Beginning with the thousand stamps, distribute them one by one among the skittles. Then divide hundreds, tens and units.

The leftover is the remainder. The answer is what one skittle gets.

### Division – Dynamic

{Process same as GB operation.}

### Additional Resources for the Stamp Game

- Montessori Stamp Game from Amazon
- Cards from Montessori Services
- FREE Stamp Game Printables from Montessori Printshop
- Stamp Game App
- DIY Stamp Game
- DIY Stamp Game from What Did We Do All Day?

Marnie

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