February 7, 2017

by Byron Delcomb

Lesson plan

Area: Whole, Parts, and Shapes

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Contents

Grade

Third Grade

Subject

View aligned standards

3.MD.C.7.b

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Learning Objectives

Students will be able to define area in terms of fractions of a whole.

Introduction

(5 minutes)

Show an image of a circle divided into four equal parts. Ask your students what they see.
Take notes of student responses for the whole class to see. Circle terms that refer to a fraction (part, of) or the whole (the entire shape).
Ask your class probing questions to tease out answers that prompt fraction terms, if necessary.

Explicit Instruction/Teacher modeling

(5 minutes)

Point out how shaded and unshaded parts of the circle are a fraction, or parts, of the whole. Write them in fraction number form. For example, each part is equal to 1/4.

Guided Practice

(5 minutes)

Hand out and preview the Area: Parts of a Whole in Shapes worksheet directions.
Complete the first few exercises as a class and answer any clarifying questions.

Independent working time

(15 minutes)

Students will finish the remaining questions independently, in pairs or small groups.
Early finishers should cross-reference their work with one another.

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Differentiation

Support

To scaffold, label one or all internal shapes with fraction forms for each problem on the Area: Parts of a Whole in Shapes worksheet.

Enrichment

Have students generate new challenge problems with a tessellation (see suggested media).

Assessment

(5 minutes)

Have a student retell an exercise from the Area: Parts of a Whole in Shapes activity, in their own words. Ask them to describe what steps they plan to take. Clarify misunderstandings with probing questions.

Review and closing

(10 minutes)

Draw connections to examples in this lesson. Make sure to re-evaluate the essential question, "Why must a square be a standard unit of measure?"
Ask students to turn and tell a neighbor one new thing they learned in the lesson.

Lesson plan

Area: Whole, Parts, and Shapes

Learning Objectives

Introduction

Explicit Instruction/Teacher modeling

Guided Practice

Independent working time

Differentiation

Assessment

Review and closing

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Lesson plan

Area: Whole, Parts, and Shapes

Learning Objectives

Introduction

Explicit Instruction/Teacher modeling

Guided Practice

Independent working time

Differentiation

Assessment

Review and closing

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