Unit 3

Measuring Length

Unit Goals

Unit Narrative

This unit introduces students to standard units of lengths in the metric and customary systems.

In grade 1, students expressed the lengths of objects in terms of multiple copies of a shorter object laid end to end without gaps or overlaps. The length of the shorter object serves as the unit of measurement.

In this unit, students learn about standard units of length: centimeters, meters, inches, and feet. They examine how different measuring tools represent length units, learn how to use measurement tools, and measure and estimate the lengths of...

Section A

Section Goals

Section Narrative

This section introduces two metric units: centimeter and meter. Students use base-ten blocks, which have lengths of 1 centimeter and 10 centimeters, to measure objects in the classroom and to create their own centimeter ruler. Students iterate the 1-centimeter unit just as they had done with non-standard units in grade 1.

Students relate the side length of a centimeter cube...

Let’s measure length.

Let’s measure in centimeters.

Let’s make rulers to measure and compare lengths in centimeters.

Let’s estimate and measure in centimeters.

Let’s measure lengths in meters.

Let’s solve story problems about reptile lengths.

Let’s practice addition and subtraction.

Section A Practice Problems

to access Section Checkpoints.

Section A

Let’s measure length.

Let’s measure in centimeters.

Let’s make rulers to measure and compare lengths in centimeters.

Let’s estimate and measure in centimeters.

Let’s measure lengths in meters.

Let’s solve story problems about reptile lengths.

Let’s practice addition and subtraction.

Section B

Section Goals

Section Narrative

In this section, students apply measurement concepts and skills from earlier to measure and estimate lengths in two customary units: inches and feet.

As in the previous section, students make choices about the tool to use based on the length of the object being measured (MP5) and measure the length of the same object in both feet and inches. They...

Let’s measure in inches.

Let’s measure longer lengths with U.S. units.

Let’s measure without starting at 0.

Let’s solve story problems about length.

Let’s solve 2-step story problems about length.

Let’s estimate and measure objects.

Section B Practice Problems

to access Section Checkpoints.

Section B

Let’s measure in inches.

Let’s measure longer lengths with U.S. units.

Let’s measure without starting at 0.

Let’s solve story problems about length.

Let’s solve 2-step story problems about length.

Let’s estimate and measure objects.

Section C

Section Goals

Section Narrative

In this section, students apply their understanding of measurement and data to create and interpret line plots. Students learn that the horizontal scale is marked off in whole-number length units, the same ones used to collect the data.

Students recognize that the numbers on the number line represent lengths and each “x” above a number represents an object of that...

Let’s learn a new way to represent data.

Let’s represent data in line plots.

Let’s represent and make sense of data in line plots.

Let's measure to create line plots and add and subtract within 100.

Let’s make a yardstick.

Section C Practice Problems

to access Section Checkpoints.

Section C

Let’s learn a new way to represent data.

Let’s represent data in line plots.

Let’s represent and make sense of data in line plots.

Let's measure to create line plots and add and subtract within 100.

Let’s make a yardstick.

to access End-of-Unit Assessments.

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Measuring Length

Unit Goals

Unit Narrative

Section Goals

Section Narrative

Section A Practice Problems

Section Goals

Section Narrative

Section B Practice Problems

Section Goals

Section Narrative

Section C Practice Problems

Unit 3 Resources

About Unit 3

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Section Goals

Section Narrative

Section B Practice Problems

Section Goals

Section Narrative

Section C Practice Problems

Section Goals

Section Narrative

Section A Practice Problems