Curriculum  /  Math  /  2nd Grade  /  Unit 7: Working with Even, Odd, and Equal Groups  /  Lesson 12

Working with Even, Odd, and Equal Groups

Lesson 12

Math

Unit 7

2nd Grade

Lesson 12 of 12

Objective

Partition rectangles into rows and columns of equal-sized squares, not drawn to scale, and find the total.

Student-Facing

I can partition rectangles into rows and columns of equal-sized squares and find the total.

Common Core Standards

Core Standards

  • 2.G.A.2 — Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.

Foundational Standards

  • 1.OA.D.7

Criteria for Success

  1. Partition non-scaled rectangles into equal-sized squares. 
  2. Find the total number of equal-sized squares by counting. 
  3. Understand that when partitioning rectangles that there are columns and rows of squares that make up the rectangle. 
  4. Represent the total of squares that make up the rectangle as a repeated addition equation.

Tips for Teachers

In this lesson, students see rectangles and equal-sized squares that are not drawn to scale, so they are pushed to use growing spatial understanding to see that the rectangles are composed of and partitioned into equal-sized squares.

Lesson Materials

  • Ruler (1 per student)
  • Square inch tiles (25 per student)

Warm Up

5-10 minutes

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Anchor Tasks

15-25 minutes

Problem 1

Which rectangle would be made up of 15 equal-sized squares? Explain your thinking.

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Purpose

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Problem 2

a.   Draw lines to partition the rectangles into equal squares. Represent the total number of squares with 2 repeated addition equations.

b.   Find the number of equal-sized squares that make up this rectangle. What repeated addition equation supports your thinking?

Purpose

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Problem Set

15-20 minutes

Target Task

5-10 minutes

Use a ruler to draw lines to partition the rectangle into equal-sized squares.

Write a repeated addition equation to represent the total number of squares.

Student Response

Additional Practice

Daily Word Problems, Warm Ups, and Center Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.

Word Problems and Fluency Activities

Lesson Map

A7CB09C2-D12F-4F55-80DB-37298FF0A765

Topic A: Even and Odd Numbers

Topic B: Composing and Analyzing Arrays

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