1. Customary Linear Measurement G5.4M.C4.PO3. I can choose the appropriate unit of measurement for any problem.

2. Essential Questions: What are the units for measuring length in the customary system? How do we know which unit to use?

3. There are 2 different systems of measurement: customary and metric

4. The customary system is primarily used in the United States The metric system is used in most of the rest of the world

5. Today I can choose the appropriate unit for measuring length and distances within the customary system.

6. There are four units for measuring length in the customary system: InchesFeetYardsMiles

7. Inches are the smallest unit in the customary system. One inch is about the width of your thumb. Inches are measured with a ruler

8. Here are some objects that would be appropriate to measure in inches: length of a pencilheight of a small flower length of a paper clip

9. A foot is almost as long as a piece of notebook paper There are 12 inches in one foot

10. Here are some objects that would be appropriate to measure in feet: length of a car height of a person height of your classroom door length of a couch height of a tall tree

11. When you hold your arms out at both sides and measure from fingertip to fingertip, that is about the same as one yard. There are 3 feet in one yard There are 36 inches in one yard

12. Here are some objects that would be appropriate to measure in yards: length of a swimming pool that is used for competition distance from your classroom to the cafeteria length of a football field height of a 10 story building

13. A mile is the largest unit for length in the customary system. Miles are used for very long distances. There are 1,760 yards in a mile There are 5,280 feet in a mile

14. Here are some distances that would be appropriate to measure in miles: distance from your house to the mall distance from Tucson, AZ to Disneyland distance from Desert Willow to the U of A

15. InchesFeetYardsMiles InIn Fourth GradeYouMeasure!

16. Your Turn! What is the appropriate unit to use to measure each object or distance?

17. Closure: On your slate, write one example of an object/distance you can measure with each customary unit of length. Be prepared to share!