## Numeration of the Decimal System

## Exercise 2: Complete Layout of Number Cards

MATERIAL:

- The large number cards

AGE:

- 4 years and older

PURPOSE:

- To give the understanding that every time "9" is reached, we go
to the "1" of the next hierarchy

- To understand the written symbols

EXERCISE:

- The teacher takes the large number cards and sits beside the
child at a table which is large enough for the exercise. She
takes the unit cards and asks the child to name them as she lays them
out. She places "1" at the top left of the table and the rest in
a column under the "1" card, while the child counts, "one,
two,...nine." The teacher then takes the "ten" cards. She
places the "10" just to the left of, and parallel to the "1" card.
Under the "10" card, she places 20, 30, etc, in a column and shows the
child to count, "One ten, two tens, three tens,"...up to nine tens, as
she does so. (Note: The
names twenty, thirty, up to ninety are taught in a subsequent
lesson. At this time, we refer to the number of tens.)
She then takes the 100 cards. She places the 100 a little to the
left of, and parallel to the 10 card. She arranges the hundred
cards in a column while the child names them, "100, 200,...900".
Then, the teacher takes the thousand cards. She places the "1000"
card slightly to the left of, and parallel to the 100 card. She
lays the thousand cards in a column while the child names them, "1000,
2000,... 9000". The teacher and child look at the result.
The child gets a clear impression of 1 to 9 in each category.
This exercise must be repeated on subsequent days. The material
is kept available for the child to use in this way whenever he or she
likes.