Math Central
Grade 3, Chapter 8 Investigation Organizer:

Land Ho!


Summary: Ships at sea send messages to each other by using signal flags. Your group will make the 26 International Alphabet Flags, and then send messages to other groups in your class.

1. Plan It

A. Plan your flags. Use Nautical Alphabet Flags to plan your flags. You can use the flag chart on page 301 of your textbook or use flags at this Internet site:

B. Decide how big to make each flag. Your group will also have to decide what message to send.

[Checkbox] Our planning completed


2. Put It Together

A. Make your flags. Use graph paper to make the alphabet flags for the letters. Color in each flag.

B. Create fractions. Write the fraction for each color on the back. For example, the flag for "T" is 1/3 red, 1/3 white, and 1/3 black.

[Checkbox] Our creating completed


3. Wrap It Up

A. Send a message to another group with your flags. Read the messages sent to you.

B. Design a new flag. Use fractions to design a new alphabet flag for one of the letters.

[Checkbox] Message sending completed


4. Discuss Your Results

[Checkbox] Review completed


Return to Investigation Page.


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