Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.

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Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.

Increasing Rigor

  • Display 2 pieces of yarn of equal length. Have one piece of yarn placed in a straight line while the other one is displayed in a curved shape. What do you predict about the lengths of the two pieces of yarn? How would you explain to a friend how to best measure the lengths of the pieces of yarn? Now actually measure the two pieces of yarn and determine which one is longer and by how much.
  • Have students find a partner with a pencil. Compare the size of your pencil with the size of your partner’s pencil. What is the difference between the two pencils in centimeters? What about the difference in inches?
  • Find five items in the room that are smaller than your pencil. How much smaller than your pencil are they?
  • Find an item in the room that is about twice the size of your pencil. How do you know?
  • Alyssa has a piece of railroad track that is 10 inches long. Trey has a piece of railroad track that is 23 centimeters. Whose train track is the longest? Use your ruler to draw a picture to help solve this problem.

About the Math

Ask students to visually compare two or more objects. Which object is longer? shorter? or in between to objects. Then move to actual measurements. How much longer is your desk than the table? How can you find out? It is also important for students to compare lengths that are not in straight lines. Place yarn or tape on the floor in curvy configurations and ask students which is longer. Ask students to figure out if it is longer to walk to the gym or the cafeteria? How can we find out? When students are comparing lengths of objects they are internalizing the meaning of length and distance. Essential vocabulary for this standard includes: length, unit, inch, foot, centimeter, meter, and difference (online dictionary, visual mathematics dictionary, HCPSS Vocabulary Cards).


Rich Tasks for Multiple Means of Engagement, Expression, and Representation (UDL)

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Teaching Student-Centered Mathematics, K-3


Crooked Paths, pages 249 - 250

Make some crooked lines with yarn, tape or another material. Have students guess which path is longer. Then have students choose a measuring tool (i.e. ruler, yard stick, meter stick) and measure and record the paths. Then have students explain which path is longer and why. Students can also explain if the results surprised them or not.

Crooked Paths Black Line Master

Activity 8.1, Longer, Shorter, Same, page 228
Make a sorting-by-length station at which students sort objects as longer, shorter, or about the same as a specified object. It is easy to have several such stations in your room. The reference object can be changed occasionally to produce different sorts. A similar task is to put objects from shortest to longest.

Activity 8.2, Length Hunt, page 229
Give pairs of students a strip of tagboard, a stick, a length of rope, or some other object with an obvious length dimension. The task on one day might be to find five things in the room that are shorter than, longer than, or about the same length as their object. They can draw pictures or write the names of the things they find.
By making the target length a standard unit (e.g., a meter stick or a 1-meter length of rope), the activity can be repeated to provide familiarity with important standard units.

Learnzillion Video Resources (5 Lessons)

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Select image for lesson set.

Print Resources:

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Number Sense, Grades 1-2:
How Long is a Handful, pages 40 - 41,

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Groundworks, Reasoning About Measurement Grade 3:
Pencils, pages 1 - 6
Maps, pages 80 - 86


Web Resources:

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Games and Centers
Lessons
Student Resources
Video Segments
Gummy Worm Stretch Center
Are You A Square or a Rectangle? Lesson seed
Measuring in Inches & Centimeters
Student Resource Page

Measurement Slide Game
The long and short of it Lesson plan
Virtual Manipulatives

Teacher guide for virtual manipulatives 2.MD.4

Comparing Measurement online game
Measurement Hunt Lesson plan
Are You a Square or a Rectangle?
Student Resource Page

Time to Move

online game
Big and Little Lesson plan
Measuring Cuisenaire Rods and Lengths
Student Resource Page


Rod Towers Lesson plan
Comparing Lengths in Centimeters
Student Resource Page


Body Measurement- Lesson seed
Comparing Lengths in Meters
Student Resource Page


2.MD.4 Task Estimate and Measure Task 3b-Anthony the Ant and Caleb the Caterpillar


Children's Literature:


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Polly's Pen Pal by Stuart Murphy

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The long and short of it
by Cheryl Nathan and Lisa McCourt

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Millions to Measure by David Schwartz






Questions/Comments:

Contact John SanGiovanni at jsangiovanni@hcpss.org.


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Howard County Public Schools Office of Elementary Mathematics Curricular Projects has licensed this product under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.