# Colored Bead Bars: Constructing a Product

From wikisori

## Contents

### Age

6-9.

### Materials

- Box of colored bead bars 1-10Chart I

### Preparation

### Presentation

- Directress writes a product on a piece of paper and places it on the table (it will be the heading).
- Directress says to the child: "Let's see how many ways we can make 12? Shall we try with one?"
- The child should see that any number can be made using one, therefore it will be omitted for this game.
- Beginning with two, the child tries to make 12 by repeating 2, skip counting as he takes out the bars.
- Stopping at 12, he finds that 2 taken six times equal 12.
- These bars are placed in a column under the strip. the child writes the combination in his notebook.
- 12 = 2 x 6, which is read 12 is constructed by taking 2, 6 times.
- Go on trying with 3 and 4 following the same steps.
- When the child tries with 5, he will find that 15 is greater than 12, so the bead bars are put back in the box.
- Go on with 6.
- Trying with 7, the child finds that it won't work, because at the second bar we've already exceeded 12. Thus we must stop at 6.

### Control Of Error

The child looks on Chart I, finds the combinations he has made, and the absence of 12 in the 5 column, 7 column and so on.

### Points Of Interest

### Purpose

**Direct Aim:**

- To help the child with the memorization of multiplication.

**Indirect Aims:**

- Preparation for memorization of division
- Preparation for decomposition into prime factors
- Preparation for the study of multiples

### Variation

### Links

### Handouts/Attachments