• 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

  • Part 1: Where Are the Teens?
  • Part 2: Saying 13 in Japan
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 2

  • Part 1: Group Beans to Count
  • Part 2: Compare Bean Counts
  • 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

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

• Lesson 6

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

• Lesson 7

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

• Lesson 8

  • Part 1: Launching the Lab and Drawing a Picture
  • Part 2: Collecting the Data
  • Part 3: Graphing the Data
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

Lesson 7

Numbers in the News

Est. Class Sessions: 1–2

Daily Practice and Problems

X

Teacher Notes

X

Students may need links to visualize the answer.

1. The bookcase is wider.
2. Possible response: I thought about ten frames.

21 is one more than 2 groups of ten and 19 is one less.

Q. Compare Lengths

Use links, cubes, ten frames, or number lines.

Rita measured her bookcase with her 60-link chain. She said that the width of the bookcase was 2 groups of ten links and 1 more link.

Nick measured his window. He said that the window was 19 links wide.

1. Which object is wider? ______________________
2. Show or tell how you decided.