## Monday 14 July 2014

### Montessori Activity: Hundred Chain - Linear Counting

AGE: 5 and up (after the child who has experience with the Decimal System, Teen Board, Ten Board and Hundred Board)

OBJECTIVE(S):

1. To give the child a means of counting other than one-by-one.
2. Learn to count in bases other than ten.
3. Preparation for multiplication skill.
4. Development of Order, independent, concentration and coordination.
5. Development of mathematical mind.

MATERIALS:

1. 1 hundred chain consisting of 10 ten-bars
2. 1 hundred-square
3. 1 box or an envelop containing arrowed tags:
- Green tags1-9
- Blue tags10-90
- A red tag100
4. 1 pointer for counting
5. 1 large mat

PRESENTATION:

1. Show your child how to hold the 100-chain by both ends and put it vertically on the mat.

2. Slowly fold the 100-chain into a hundred-square and draw your child to notice how it looks like a 100-square.

3. Place the 100-square on top of the folded 100-chain to show that they are the same.

4. Straighten out the 100-chain.

5. Take out the unit arrows (green), tell your child what it they are called and tag them to the left of the 100-chain, by taking a counter, count "1" and tag 1.

6. Take out the green tag 2, count "1, 2" with the counter and tag 2.

7. Continue the same manner for the rest of bead chains.

8. Take out the ten arrows (blue) and continue in the same manner, counting and tagging 10, 20... 90, in multiple of 10 until you reach 100 and place the hundred tag (red) at the 100th bead.

9. Count with the child all the arrow tags: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

10. Then practise counting backwards: 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1.

VIDEON DEMONSTRATION:

http://youtu.be/dFWENQI3QzY

POINTS OF INTEREST:

1. Seeing different length of chains.
2. Seeing different color tags.

VARIATION:

1. Writing the tag numbers on paper.
2. Let children write the number of counting in bead chains.

REFERENCES:

http://www.montessorialbum.com/montessori/index.php?title=Hundred_Chain

http://www.infomontessori.com/mathematics/skip-and-counting-linear-counting.htm