The Exchange Game
From Montessori Album
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|The Exchange Game|
|Math - Introduction to the Decimal System|
|Age||4 - 5|
|Prerequisites||The Exchange Tray|
|Materials||full set of Golden Beads|
This activity shows the child that when quantities are organized it is much easier to see how much you have.
It also gives the child practice in exchanging.
- Lay out a rug with two small bowls for counting unit beads
- Take the child to the bead cabinet and start filling a tray with a random amount of units, tens, hundreds, and thousands.
Take the tray to the mat. "What a mess! I wonder how many beads we have here."
- Sort the beads into piles by place value.
- Start counting the units.
- When you get to 10 units, have the child exchange them for 1 ten bar.
Place this ten bar with the others.
- Count the remaining units (if there are any).
Exchange for ten bars if needed unit until there are fewer the ten units left.
- Start counting the tens.
- When you get to ten have the child exchange these for 1 hundred square.
Place this with the other hundred squares. Exchange again if needed until you have fewer than 10 ten bars.
- Start counting the hundreds.
- When you get to 10 hundreds, have the child exchange them for 1 thousand cube.
Place this thousand cube with the others. Exchange again if needed until you have fewer than 10 hundreds.
- Allow the child to see how easy it is to tell how much you have after exchanging.
Points of Interest
- having a chaotic mixed-up amount of beads at the beginning
Control of Error
There will be fewer than 10 in each pile
Variations and Extensions
Where to Buy
see Golden Beads
- Teaching Montessori in the Home: The School Years by Elizabeth G. Hainstock, pages 42-43