Estimating Lengths


Students will be able to estimate lengths using inches, feet, centimeters, and meters.

Estimating Lengths Lesson Plan Includes:

  • Full Teacher Guidelines with Creative Teaching Ideas
  • Instructional Content Pages about Estimating Lengths
  • Hands-on homework activities giving students practice on Estimating Lengths
  • Answer Keys
  • Common Core State Standards
  • Many Additional Links and Resources
  • Built for Grades 2-3 but can be adapted for other grade levels.

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By the end of this lessons, your students will be able to estimate lengths using inches, feet, centimeters, and meters.  The lesson begins by reviewing the basic units for measuring distance, height and length, along with the difference between US Standard Units and the Metric system.  The lesson frequently reminds students of the proper way to write measurements, and to use the word “about” to indicate they are estimating. 

Sample classroom Procedures:

  1. Begin by explaining to students that being exact is not always possible, sometimes we have to estimate or make an educated guess about a problem.
  2. While reading the content pages, reinforce vocabulary and give students additional examples of estimating length problems in order to help them practice.  Use the additional resources to enhance understanding.
  3. Introduce the notes on estimating lengths. Have students practice problems using the Standard and Metric systems.  Use the additional resources to enhance understanding.
  4. Have students practice problems using different measurement systems.
  5. Follow Activity page with students. Have students work individually or in pairs.  Instruct students to gently roll the ball underhand instead of throwing or hurling the ball.
  6. Distribute Practice page. Check and review the students’ responses as a class.  If needed, visually show students the actual lengths so they can begin to create a mental image of the distance.
  7. Distribute the Homework page. Have students share some of the measurements from their homes at the beginning of the next class.
  8. In closing, ask students to think of one object and share if it would be measured in inches, feet, centimeters, or meters.
  9. Allow for responses and discussion.

Common Core State Standards: 


Class Sessions (45 minutes): 1 class session

Additional Resources:

Many more teaching resources in Download!

Want more math resources? Check out our other Math Lesson Plans!

Additional information

Grade Level

2nd Grade, 3rd Grade