• Unit Overview

  • Letter Home
  • Unit Preparation
  • Mathematics in this Unit
  • Assessment in this Unit
  • Key Assessment Opportunities Chart
• Daily Practice and Problems
• Home Practice

• Lesson 1

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 2

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 3

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 4

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 5

  • Part 1: Adding One-Half Plus One-Fourth
  • Part 2: Puzzling Out Halves
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 6

  • Part 1: Choosing Appropriate Units of Measure
  • Part 2: Finding Area on a Grid
  • Part 3: Adding Fractional Parts to Find Area
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 7

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 8

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 9

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 10

  • Part 1: Sorting All Shapes
  • Part 2: Sorting Quadrilaterals
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

Lesson 4

Partition Rectangles

Est. Class Sessions: 1–2

Daily Practice and Problems

X

Teacher Notes

X

1. Shapes will vary.
2. 10 sq cm
3. 5 + 3 + 2 = 10 sq cm, or 1 + 2 + 3 + 3 + 1 = 10 sq cm

N. Area Again

1. Draw a shape with an area of 9 and one-fourth sq cm.
2. 

Area ___________________

3. Write an addition number sentence for the shape in Question B.