Unit Designs

Est. Class Sessions: 1–2

Mathematical Standards

1.NBT.A: Extend the counting sequence. (1.NBT.A.1)

1.OA.C: Add and subtract within 20. (1.OA.C.5)

Standards for Mathematical Practice

MP1.: Make sense of problems and persevere in
solving them.
MP2.: Reason quantitatively.
MP3.: Construct viable arguments and critique the reasoning of others.
MP4.: Model with mathematics.
MP5.: Use appropriate tools strategically.
MP6.: Attend to precision.

Students continue to find the area of figures using square units. They practice grouping and counting skills and use addition strategies to find the area of irregular shapes.

Content in this Lesson

Representing the partitions of quantities using number sentences and area models [E3].
Recognizing that different shapes can have the same area [E4].
Finding the area of a shape by counting square units using efficient counting strategies [E6].
Recognizing that different strategies can lead to the same answer.

Daily Practice and Problems G–H

G. At the Pet Shop

H. Number Sentence

Materials for Students

		Daily Practice and Problems	Lesson	Homework	Assessment
Student Books	Student Activity Book		Unusual Mats Page 211 Find Area with Square Units Pages 213–214		Which Two Are the Same Page 215
Teacher Resources	Teacher Guide - digital	DPP Item G DPP Item H		Area of Shapes Home Practice Part 3

Materials for Student Pairs

35 square-inch tiles
bags of 16 square-inch tiles, optional. See Materials Preparation.

Materials for the Teacher

Display of Unusual Mats (Student Activity Book) Page 211

Display of Find Area with Square Units (Student Activity Book) Pages 213–214
Unit 8 Assessment Record

Materials Preparation

Prepare Optional Targeted Practice. Place square-inch tiles in a center and ask students to use the tiles to compose two different shapes that have the same area.

Assessment in this Lesson

Assessment	Expectation Assessed
Which Two Are the Same Student Activity Book Page 215	E3. Represent partitions of quantities using number sentences and area models. E4. Recognize that different shapes can have the same area. E6. Find the area of a shape by counting square units and nonstandard units using efficient counting strategies.

Unit 8

Unit Overview

Daily Practice and Problems

Lesson 1

Lesson 2

Lesson 3

Lesson 4

Lesson 5