The Hundred Chain

Montessori Hundred Board

A hundred chain made up of 10 Ten Bead Bars.

A set of small labels, 1 through 9 in green, 10 to 90 in blue and 100 in red.

A Hundred square.

Floor mat.

Help the child to realize how much bigger one hundred are than one ten, and how much bigger one thousand is than one hundred.

Help the child grasp the conservation of number and reversibility.

Introduce the child to counting in tens.

NA

1. Place the materials on the floor mat.
2. Start by folding up the Hundred Chain into a square and put it beside the Hundred square, then ask the child, "Do you think this is the same quantity ?"
3. Now invite the child to count.
4. Begin to unfold the hundred chains, stretching them out and place them in a straight line.
5. Then count the beads starting from 1,2,...10. [/DAP]
6. When you reach 10, place a marker saying 10 on the top and then begins to count the next 10 beads.
7. At the next 10 beads place another marker saying 20 on the top and so on till you reach 100, counting 10,20,30 and so on.
8. Then say, "This Hundred Chain makes a Hundred Square" and push the Hundred Square to the end of the Hundred Chain where the marker says 100.
9. End the Work Cycle