NC.2.MD.3

Estimate lengths in using standard units of inches, feet, yards, centimeters, and meters.

Step 1: Lesson Standards & Learning Goals

Unpacking Clarification

In this standard, students estimate the lengths of objects using inches, feet, centimeters, and meters prior to measuring. The process of estimation helps the students focus on the attribute being measured and the measuring process. As students estimate, they consider the size of the unit, which helps them to become more familiar with the unit size. Once a student has made an estimate, they should measure the object and reflect on the accuracy of the estimate made and apply their understanding for future estimates and measurements.

Sample Essential Questions

How can we estimate lengths using different units of measurement?
What strategies can we use to estimate lengths accurately?
What benchmarks can we use to help us estimate lengths more easily?
How do we check the reasonableness of our estimates?

Vocabulary

accuracy
centimeter (cm)
estimate
foot (ft)
height
inch
length
measure
meter (m)
reasonable
width
yard (yd)
reasonable

Students will be able to...

Use strategies for estimating length.
Estimate lengths using units of inches, feet, centimeters, and meters.
Determine if an estimate is reasonable.
Measure an object and compare their estimate to the actual measurement.

Students will know...

Estimating means to determine about how many or how much.
Estimation can help them recognize errors in their measurements.
By comparing their estimates to actual measurements, they can learn to identify errors and refine their estimation strategies over time.

Step 2: Assessment

Mastery Connect

NC.2.MD.3 - CO - Howell - Jan. 18, 2023

NC.2 - Cluster 6 Review - CO - Howell - Feb. 17, 2023

Tools 4 NC Teachers

CFA for Cluster 6

Best Tools to Measure - MD1

NCDPI Assessments

- Grade 2 Math Assessment Practice Prompts
  - Measurement & Data

Step 3: Lesson Instructions

Possible Activating Strategies

Frayer Model
Estimate

Make Predictions
- Which object is closest to one foot? one inch? one centimeter?
Image: https://www.abcmouse.com/learn/activities/10-fun-and-interactive-measurement-activities-for-preschoolers/2837

Think-Pair-Share or Quick Talk
- Show students the image and explain that these are one type of pine tree we see here in NC.
- Ask: About how tall do you think a Loblolly Pine Tree can grow?
  - - (Loblolly Pines can grow up to 90 feet.)
- What else do you think can be as tall as a Loblolly Pine Tree?
  - - (Possible answers might include a building, distance between baseball bases, other trees, 5 giraffes, 1/4 of a football field)

Teacher Resources

Tools 4 NC Teachers
- Cluster 6 Lessons
Math Expressions - (Barnes and Hearne) - Standards Alignment
Motivation Math
Think Up! Math
Khan Academy - 2nd Grade Math
Eureka Math/Engage NY Free Resources
- Embarc Online (Eureka Math) -
  - - G2 M2 Topic B: Measure and Estimate Length Using Different Measurement Tools
    - G2 M7 Topic D: Measuring and Estimating Length Using Customary and Metric Units
- Standards Alignment
- Zearn Math - Online Support Practice for Eureka Math (Requires free account)
North Carolina Collaborative for Mathematics Learning - Grade 2 Instructional Framework
NCDPI Resources
- Math Games Grade 2
- Grade 2 Math Assessment Practice Prompts
- Grade 2 Released Summative Assessments

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