Grade 4, Chapter 4 Investigation Organizer:

**1. Plan It**

**A. Gather your objects.**

- Gather lots of small objects. Group them by kind. Write down how many of each kind of object you have.
- Mix up the objects in a large shallow box and cover them with sand.
- Put string over the sand to make a grid. Draw a grid with the same number of squares on grid paper. Number each square.
- Make a table to record how many objects of each kind you find. See page 163 of your textbook or use the Object Table here on Education Place.

**My planning completed**

**2. Put It Together**

**A. Choose a square.** Choose a grid square as your first sample space. Carefully dig up its contents. If an object is partly in your square, dig it up!

- As you uncover each item, draw it on the paper grid.

**B. Count the objects.** Count the number of objects you find in your square. Record your findings by kind.

- Repeat by digging up another sample.

**Our counting completed**

**3. Wrap It Up**

**Multiply!** Multiply the number of each kind of object you found in one square by the total number of grid squares in the box. Do this for both samples.

- Do the products from either sample come close to the actual contents?

**Multiplication completed**

**4. Discuss Your Results**

- Is your math correct in describing your squares?
- Did your grid accurately show the site?
- Did you record your findings accurately?
- Did your group divide the work among all its members fairly?
- Which group's samples predicted their box contents most clearly?

** Review completed**

Return to Investigation Page.

Copyright © 1997 Houghton Mifflin Company. All Rights Reserved.-- Math Central 4.4