Lesson Plan

Estimating Length

Advance your students from relative measurements to learning about standardized units with this lesson that teaches them about inches and feet by using common classroom objects.
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Need extra help for EL students? Try the The Language of Estimation pre-lesson.
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Need extra help for EL students? Try the The Language of Estimation pre-lesson.

Learning Objectives

Students will be able to measure and estimate lengths using inches and feet.

The adjustment to the whole group lesson is a modification to differentiate for children who are English learners.
EL adjustments

Introduction

(5 minutes)
Estimating Length 1Estimating Length 2
  • Explain to the students that today they will be measuring objects in the classroom.
  • Hold up a ruler and ask students, "What is this?" Allow students a minute to think-pair-share their answers.
  • Clarify that the object is a ruler and it is used to measure objects in inches, a unit of measurement equal to 2.54 cm or about the diameter of a quarter, and feet, a unit of measurement equal to 12 inches or about the height of a folder.
  • Tell the students that sometimes, instead of using a ruler to measure objects, they can estimate instead.

Beginning

  • Give students two sticky notes labeled "inches" and "feet." Have students place the sticky notes on one object in the classroom they could measure using inches and another object in the classroom they could measure using feet.
  • Allow students to answer using their home language (L1) with a peer who speaks the same L1.

Intermediate

  • Ask students to think of an object in the classroom that is about an inch and another object in the classroom that is about one foot. Provide sentence stems for them to use as they share out their answers:
    • ________ is about an inch long.
    • ________ is about a foot long.