1. Measuring Lengths
Estimate, weights, capacities, and geometric measurements using benchmarks in measurement with appropriate units.

2. I can…
Measure numbers using customary and metric units
Estimate measurements using benchmarks units
Self Assessment
5- I can do it without help & teach others.
4- I can do this with no help, but I don’t know if I can explain it.
3- I can do this with a little help.
2- I can do this with a lot of help!
1- I don’t have a clue.

3. Customary Units of Length
inch (in.)
foot (ft)
yard (yd)
mile (mi)
1 ft = 12 in.
1 yd = 3 ft = 36 in.
1 mi = 1760 yd = 5280 ft

4. Find the length of the caterpillar to the nearest inch.
Line up one end of the caterpillar at the mark for 0.
The other end of the caterpillar is between the 4 inch and the 5 inch mark.
The caterpillar is about 4 inches long

5. Metric Units of Length millimeter (mm) 1 cm = 10 mm centimeter (cm)
kilometer (km)
1 cm = 10 mm
1 m = 100 cm = 1000 mm
1 km = 1000 m = 100,000 cm

6. Find the length of the eraser to the nearest millimeter.
Line up one end of the eraser at the mark for 0.
The other end lines up with the 3 cm mark, or 30 mm.
Remember, each cm equals 10 millimeters

7. Benchmark Units for Length (Approximate size)
inch – length of a small paper clip
foot – distance from elbow to knuckle
yard – width of a door
millimeter – thickness of a dime
centimeter – width of your little finger
meter – height of a chair

8. Choose an appropriate customary unit & metric unit for the length.
Length of a marathon
Height of a full grown tree
Height of a two year old child
Width of a baseball card

9. Choose an appropriate customary unit & metric unit for the length.
Length of a marathon
Mile
Height of a full grown tree
Height of a two year old child
Width of a baseball card

10. Choose an appropriate customary unit & metric unit for the length.
Length of a marathon
Mile
Kilometers
Height of a full grown tree
Height of a two year old child
Width of a baseball card

11. Choose an appropriate customary unit & metric unit for the length.
Length of a marathon
Mile
Kilometers
Height of a full grown tree
Feet or Yards
Height of a two year old child
Width of a baseball card

12. Choose an appropriate customary unit & metric unit for the length.
Length of a marathon
Mile
Kilometers
Height of a full grown tree
Feet or Yards
Meters
Height of a two year old child
Width of a baseball card

13. Choose an appropriate customary unit & metric unit for the length.
Length of a marathon
Mile
Kilometers
Height of a full grown tree
Feet or Yards
Meters
Height of a two year old child
Inches or Feet
Width of a baseball card

14. Choose an appropriate customary unit & metric unit for the length.
Length of a marathon
Mile
Kilometers
Height of a full grown tree
Feet or Yards
Meters
Height of a two year old child
Inches or Feet
Centimeters
Width of a baseball card

15. Choose an appropriate customary unit & metric unit for the length.
Length of a marathon
Mile
Kilometers
Height of a full grown tree
Feet or Yards
Meters
Height of a two year old child
Inches or Feet
Centimeters
Width of a baseball card
Inches

16. Choose an appropriate customary unit & metric unit for the length.
Length of a marathon
Mile
Kilometers
Height of a full grown tree
Feet or Yards
Meters
Height of a two year old child
Inches or Feet
Centimeters
Width of a baseball card
Inches

17. I can…
Measure numbers using customary and metric units
Estimate measurements using benchmarks units
Self Assessment
5- I can do it without help & teach others.
4- I can do this with no help, but I don’t know if I can explain it.
3- I can do this with a little help.
2- I can do this with a lot of help!
1- I don’t have a clue.

18. Daily Check 2.1 in your math notebook
Choose an appropriate metric measuring tool for the length of a cell phone.
Choose an appropriate customary and metric unit for the height of an elephant.
Use a benchmark to estimate the height of a paperback book in centimeters.