Use Repeated Addition

Est. Class Sessions: 2–3

Mathematical Standards

1.OA.A: Represent and solve problems involving addition and subtraction. (1.OA.A.1, 1.OA.A.2)

Standards for Mathematical Practice

MP1.: Make sense of problems and persevere in
solving them.
MP2.: Reason quantitatively.
MP4.: Model with mathematics.
MP7.: Look for and make use of structure.

Students find the volume of cube structures by skip counting and writing number sentences showing repeated addition. They build cube models from 3-dimensional drawings and compare them. In the Adventure Book, Manuel has exciting adventures in a dream where animals are changed into cube creatures.

Content in this Lesson

Finding volume by skip counting and using repeated addition [E1].
Writing number sentences to represent volume [E2].
Connecting between different representations of shapes (3-dimensional drawings and cube models).
Recognizing that different shapes can have the same volume [E5].
Using geometric modeling to solve problems.
Using visualization and spatial reasoning skills to justify solutions [E6].

Daily Practice and Problems K–N

K. What Is Missing?

L. Weather Data

M. The Hour and the Half Hour

N. Move It to Make Ten

Materials for Students

		Daily Practice and Problems	Lesson	Homework	Assessment
Student Books	Student Activity Book	Ten Frames Reference	Skip Count and Add Pages 441–442		Compare Ruffy and the Snake Pages 443–444
Student Books	Adventure Book		A World of Cubic Animals Pages 1–22
Teacher Resources	Teacher Guide - digital	DPP Item K DPP Item L DPP Item M DPP Item N		Home Practice Parts 4–5

Supplies for Students

connecting cubes
calculator

Supplies for Student Pairs

30 connecting cubes

Materials for the Teacher

Display of A Gate for Ruffy Master (Teacher Guide)
Display of A Gate for Gruffy Master (Teacher Guide)
Unit 13 Assessment Record
connecting cubes, optional

Materials Preparation

Build Some Models of Ruffy. If needed, build a few samples of the model of Ruffy on the Compare Ruffy and the Snake pages in the Student Activity Book. Have these available for students who need assistance with building the model from the drawings. Students can then focus on finding and comparing volumes.

Assessment in this Lesson

Assessment	Expectation Assessed
Compare Ruffy and the Snake Student Activity Book Pages 443–444	E1. Solve problems involving volume using repeated addition and skip counting. E5. Recognize that different shapes can have the same volume. E6. Justify a solution using visual and spatial reasoning.

Unit 13

Unit Overview

Daily Practice and Problems

Lesson 1

Lesson 2

Lesson 3

Lesson 4

Lesson 5