Shu-Chen Yen's On-Line Montessori Albums

MATH DEVELOPMENT ALBUM

3.9 THE FORTY-FIVE LAYOUT (VERTICAL) AND BUILDING NUMBERS


MATERIALS:

45 unit beads, tens, hundreds and thousands

One set of large numeral cards

9 containers for the units

Optional: Special paper and pencils: green, blue and red.

CONTROL OF ERROR:

The exact number of beads is provided, the even progression of the pattern of the beads.

AIM:

Reinforcement of the golden bead exercises preceding this one.

POINT OF INTEREST:

The large size of the layout, building the thousands (optional).

PRESENTATION:

1. Place the unit container down to the left side of the rug, save some space for place symbols. Random the numeral cards 1-9.

2. Open the small box which contains 45 units. Take 1 unit and drop it into the first container as well as count "one".

3. Ask the child to find the numeral to match the quantity: 1-unit and place #1 left to the container.

4. Continue doing the same activity until the symbol cards for 9 is reached.

5. Obtain the ten-bar box, get 1 ten-bar and place it under the ninth of container, then count "1 ten". Random the cards 10-90 before place the 10-bar.

6. Ask the child to find the number and give it to you.

7. Place it left to the 1-ten.

8. Obtain 1-ten bar, place it under the previous quantity, count "1-ten". Then get another ten-bar and count "2-ten".

9. Ask the child to find the number and give it to you, place it under #10.

10. Continue doing the same activity until all cards for 90 are reached.

11. Random the cards 100-900.

12. Place 100 square under the 9 ten-bars. Ask the child to find the symbol and give it to you.

13. Place the symbol #100 left to the hundred square.

14. Take 100 square and put it under the previous square, count "100", then get another 100 square and put it above the square as well as count "200".

15. Ask the child to find the numeral for you, then place it left to the quantity.

16. Continue doing the same activity until all the symbol cards of 900 are reached.

17. Random the cards 1000-9000.

18. Get 1000 cube, place it under 900 squares, ask the child to find the symbol for you, then place the symbol under 900.

19. Get 1000 cube, count 1000, place it under the previous cube, get another cube and put on it, count 2000.

20. Ask the child to find the symbol #2000 and place it under #1000.

21. Continue doing the same activity until all the symbol cards for 9000 are reached.

22. Stand up, observe the layout and count from 1-9, 10-90, 100-900, 1000-9000.

23. After the layout is completed, build large numbers (4 place value).

NOTE:


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