Units of Measurement Inches Centimeters Activity
This units of measurement inches centimeters activity has 2nd-3rd grade students measure true-size objects with inch and centimeter rulers and compare the two numbers. An answer key is included.
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About this resource
Description
Children often wonder why the same pencil can be about 6 inches long and also 16 centimeters long. This units of measurement inches centimeters activity answers that question with real measuring. Students measure each object twice, once with an inch ruler and once with a centimeter ruler, and then compare the two numbers. They discover that a smaller unit always gives a bigger number, because it takes more small units to cover the same length.
How the Activity Works
This inches and centimeters measuring activity uses nine true-size Measure Cards. Every object on a card is printed at its real length, so the paper rulers give exact answers. Students pick a card, line up the zero with one end of the object, and record the length in inches and in centimeters on the recording sheet. At the end they answer two questions: which unit gave bigger numbers, and why. The answer key lists every card and a model answer for the questions.
What’s Included
- Colorful cover page and a How to Use page
- 9 true-size Measure Cards
- Paper Rulers page with inch and centimeter rulers to cut out
- Recording sheet with a compare-the-units question
- 2nd grade practice worksheet: measure ribbons in inches and centimeters
- Answer key for the cards and the practice page
3 Reasons Kids Love It
- Measuring real-size pictures feels like a hands-on lab.
- Seeing two numbers for one object makes the size of each unit easy to understand.
- Cutting out their own rulers gives every student a tool to keep.
Ideas for Teachers and Parents
Use the units of measurement inches centimeters activity at a math center, with a partner, or as a measurement unit review. 2nd grade students meet the standard of measuring an object twice with different units, and 3rd grade students can use it to review before measuring to the half inch. Ask students to predict the centimeter number before they measure. At home, families can measure toys and spoons with both rulers.
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