Lesson 3

Measure with Standard Units: Long Lengths

Est. Class Sessions: 1–2
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Mathematical Standards

2.NBT.A
Understand place value. (2.NBT.A.4)
2.MD.A
Measure and estimate lengths in standard units. (2.MD.A.1, 2.MD.A.2, 2.MD.A.3)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.
MP8.
Look for and express regularity in repeated reasoning.

Students measure longer lengths using standard units: yards, feet, centimeters, and meters. They compare measurements to examine the relationship between the size of a unit and the number of units in a measure.

Content in this Lesson

  • Using words and symbols (e.g., <, >, =) to show comparisons of quantities (e.g., lengths) [E1].
  • Using and applying place value concepts and comparative language to compare and order lengths (e.g., shorter, longer, shortest, longest) [E2].
  • Solving word problems (e.g., compare) involving length [E3].
  • Recognizing that the measure of a length is dependent on the size of the unit of measure (e.g., a pencil is 6 inches or 15 centimeters) [E4].
  • Estimating length using standard units (e.g., centimeters, meters, inches, feet, yards) [E5].
  • Measuring length using standard units (e.g., centimeters, meters, inches, feet, yards) [E6].
  • Selecting and using appropriate units (e.g., centimeters, meters, yards, inches, feet) to measure length [E7].
  • Using labels to show what numbers mean [MPE6].

Daily Practice and Problems G–H

G. Measurement Sense

H. Add Big Numbers

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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Book

Student Activity Book

Teacher Resources

Teacher Guide - digital

Supplies for Student Groups

2 12-inch rulers
2 yardsticks
2 metersticks marked in centimeters

Materials for the Teacher

Display of Going the Distance: Feet and Yards (Student Activity Book) Page 189
Display of Going the Distance: Meters and Centimeters (Student Activity Book) Page 191
Unit 4 Assessment Record
masking tape
2 Apatosaurus footprints from Lesson 1
Measurement Advice Chart from Lesson 1 and Lesson 2
"How Long" display chart from Lesson 2
sidewalk chalk, string, or adding machine tape, optional
index cards, optional
various units and tools to measure length (e.g., ruler, palms, footprints), optional

Materials Preparation

Gather Rulers. Students will need a ruler calibrated in centimeters and a ruler calibrated in inches. These rulers often come together. One side of the ruler is 12-inch ruler and other side is a 30-centimeter ruler. Students will also need a yardstick and a meterstick. A meterstick often has inches on the reverse side. If you do not have yardsticks, place a piece of tape after 36 inches on the meterstick to show students a yardstick. Write "yard" on the tape.

Make a "How Long" Display. If you did not do so in Lesson 2, identify a display space that is large enough to collect a few examples of distances that measure 1 inch, 1 centimeter, 1 meter, 1 yard, and 1 foot. Title the display "How Long." Draw a heavy line with end points that shows each unit of measure. Leave enough room around each unit to collect the names of and examples of distances that measure each unit. Gather one or two examples of distances or objects that measure about 1 yard to add to the display.

Create Lines on the Floor. If you did not do so in Lesson 1, identify a location to place six lines of different lengths. Each line should be straight and there should be space between the lines so that students can work. Use masking tape to make each line and identify each with a letter. See Figure 1. Line F should be 6 meters but should be organized into a zigzag shape with four 2-meter sections.

image

Figure 1: Descriptions of lines

TIMS Tip

Tape can be left for a few days, is durable, and does not move. If you cannot leave the tape on the floor for a few days, you may want to try some of these alternatives: chalk, string, or strips of adding machine tape.

Choose and Measure Activity as Optional Targeted Practice. Choose about 10 distances that students can measure (e.g., length of a stapler, pencil, the desk). Record each distance on a different index card. Provide students with a collection of units (e.g., palms, gorilla palms, footprints, elephant footprints, inches, centimeters, meters, yards). Place the cards and the measurement tools in a learning center. Ask students to choose a distance and then choose a unit to measure that distance. Students can then record the distance on the back of the index card with the unit and their initials.

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed
Going the Distance: Meters and Centimeters
with Feedback Box
Student Activity Book
Pages 191–192
E1. 
Use words and symbols (e.g., <, >, =) to show comparisons of quantities (e.g., lengths).
E3. 
Solve word problems (e.g., compare) involving length.
E4. 
Recognize that the measure of a length is dependent on the size of the unit of measure (e.g., a pencil is 6 inches or 15 centimeters).
E5. 
Estimate length using nonstandard (palms, footprints) and standard (centimeters, meters, inches, feet, yards) units.
E6. 
Measure length using nonstandard (palms, footprints) and standard (centimeters, meters, inches, feet, yards) units.
Measure Up
with Feedback Box
Student Activity Book
Pages 193–194
E1. 
Use words and symbols (e.g., <, >, =) to show comparisons of quantities (e.g., lengths).
E2. 
Use and apply place value concepts and comparative language to compare and order lengths (e.g., shorter, longer, shortest, longest).
E3. 
Solve word problems (e.g., compare) involving length.
E4. 
Recognize that the measure of a length is dependent on the size of the unit of measure (e.g., a pencil is 6 inches or 15 centimeters).
E7. 
Select and use appropriate measuring units (e.g., centimeters, meters, yards, inches, feet).
MPE6. 
Use labels. I use labels to show what numbers mean.