Before: Students will be placed in cooperative groups.

The teacher should ask the following essential question. This question will set a purpose for the lesson. Essential Question: "How can counting, measuring, or labeling help us to make sense of our world?"

Allow 5 minutes for each group to make a list (on the chart paper) of the ways that counting, measuring, or labeling help them in their lives.

Then, each group will share their list with the class.

During:

1. Give each group 9 books.

2. They will organize them in any way they see fit. For example: By color of the cover, how thick the books are, by title, by subject matter,etc.

3. Students will write down how they organized the books.

4. Allow 10 minutes for all groups to share.

Teacher will ask: "How would you organize a library?"

5. Give students the handout of the Kids Guide to the Dewey Decimal System.

6. The teacher will say:

"Books are placed on the shelf in increasing numerical order of the decimal number, for example: 051; 221; 331; 331.973; 331." If numbers are the same; then, the books are placed alphabetically."

7. Students will watch the slideshow on the Dewey Decimal System.

After: Assess students by having them order their 9 books according to the dewey decimal system.

If time allows, groups could play each other using the Interactive Games on the dewey decimal system.