Curriculum / Math / 2nd Grade / Unit 7: Working with Even, Odd, and Equal Groups / Lesson 11

Working with Even, Odd, and Equal Groups

Lesson 11

Math

Unit 7

2nd Grade

Lesson 11 of 12

Objective

Partition rectangles into rows and columns of equal-sized squares using square inch tiles, and find the total number of squares.

Student-Facing

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

Common Core Standards

Core Standards

The core standards covered in this lesson

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

Geometry

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

The foundational standards covered in this lesson

1.OA.D.7

Operations and Algebraic Thinking

1.OA.D.7 — Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.

Criteria for Success

The essential concepts students need to demonstrate or understand to achieve the lesson objective

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

Tips for Teachers

Suggestions for teachers to help them teach this lesson

Lesson Materials

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

Warm Up

5-10 minutes

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Anchor Tasks

Tasks designed to teach criteria for success of the lesson, and guidance to help draw out student understanding

15-25 minutes

Problem 1

a. Inside the given rectangle, build 1 row with 2 square tiles and 1 column with 3 square tiles.

b. If you had more square tiles, how many columns would there be?

c. If you had more square tiles, how many rows would there be?

d. How many square tiles would you need to fill the whole rectangle?

e. Write two repeated addition equations to show the total number of squares that make up the rectangle.

Purpose

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Problem 2

Ms. Figueroa was printing a picture of a rectangle partitioned into equal-sized squares, but the printer ran out of ink. Can you help her by using a ruler to show the equal-sized squares that make up the rectangle?

a. How many rows are there?

b. How many columns are there?

c. Write two repeated addition equations to show the total number of squares in the rectangle.

Purpose

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Problem 3

Kelly says it would take 9 squares to fill this rectangle. Do you agree or disagree? Explain.

Purpose

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Problem Set

15-20 minutes

Target Task

A task that represents the peak thinking of the lesson - mastery will indicate whether or not objective was achieved

5-10 minutes

Maria and Doug drew equal-sized squares, using chalk on the sidewalk in the shape of a rectangle. Some water spilled on their squares and erased some of them. Using what is left of their creation, how many squares did they have originally? Explain your thinking.

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

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

Lesson 12

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Working with Even, Odd, and Equal Groups

Objective

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Student-Facing

Common Core Standards

Core Standards

Geometry

Foundational Standards

Operations and Algebraic Thinking

Criteria for Success

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Tips for Teachers

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Lesson Materials

Warm Up

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Anchor Tasks

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Problem 1

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Purpose

Problem 2

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Purpose

Problem 3

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Purpose

Problem Set

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Target Task

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Student Response

Additional Practice

Word Problems and Fluency Activities

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Contact Information

School Information

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Math

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