# Module 21 - Math KB - Course Guide

## Module Overview:

In this module students will work with sets to identify sets with one less object in them. They will create story problems while subtracting from 5. They will recognize and use number words from zero to ten. Students will solve story problems with sums to 7 and will add using the commutative property.

## Module Materials:

Lesson # Lesson Title Material(s)
1 21.1 Sets with Less pen or pencil
crayons or colored pencils
2 21.2 Set Subtraction pen or pencil;
3 21.3 Word Numbers pen or pencil
crayons or colored pencils
4 21.4 Story Problems that Add to 7 pen or pencil;
5 21.5 Commutative Property pen or pencil;

Module Objectives:

Lesson # Lesson Title Objective(s)
1 21.1 Sets with Less
1. Select a set with one less than a given set.
2 21.2 Set Subtraction
1. Create story problems that subtract from 5.
3 21.3 Word Numbers
1. Recognize and use number words: zero to ten.
4 21.4 Story Problems that Add to 7
1. Create story problems that add to 7.
5 21.5 Commutative Property
1. Use the commutative property of addition.

Module Key Words:

Key Words
subtract by one
sets
story problems
subtract from 5
word numbers
zero to ten
commutative

Module Assignments:

Lesson # Lesson Title Page # Assignment Title
1 21.1 Sets with Less 5 Sets With One Less Assignment
2 21.2 Set Subtraction 4 Take From Five Assignment
3 21.3 Word Numbers 4 Read, Write, and Count! Assignment
4 21.4 Story Problems that Add to 7 5 If You Were a Plus Sign Assignment
5 21.5 Commutative Property 4 Rainbow to Ten Assignment

None

## Module Guiding Questions:

When a student starts a lesson ask them questions to check for prior knowledge and understanding and to review concepts being taught. At the end of the lesson ask the questions again to see if their answer changes.

Lesson Title Question
21.1 Sets with Less
1. What is a set?
2. What does more mean?
3. What does less mean?
21.2 Set Subtraction
1. What is a story problem?
2. What are some ways you can solve a subtraction story problem?
21.3 Word Numbers
1. Can you read your numbers and number words from zero to ten?
21.4 Story Problems that Add to 7
1. What is a story problem?
2. Can you add to 7?
21.5 Commutative Property
1. What is the commutative property of addition?

## Module Video Questions:

When a student watches a video take time to ask them questions about what they watched. Suggested questions for the videos in this module are listed here. Suggestion: Have the student watch the entire video first all the way through. Then have them watch the video a second time, as they watch it pause the video and ask the questions.

Lesson Title Video Question
21.1 Sets with Less One is Missing
1. In your Math notebook, draw each set mentioned in the video and show the subtraction problem that was solved.
21.2 Set Subtraction The Story Brothers
1. Can you tell a subtraction story problem?
21.5 Commutative Property Share the Road
1. What is the commutative property of addition?
2. Give examples of this property from the video.

## Module Suggested Read Aloud Books:

Take time to read to your student or have them read aloud to you. Read a different book each day. While reading the book point out concepts being taught. You may purchase these books or find them at your local library. Suggested things to discuss while reading the book:

• What is the main idea?
• What are three things new you learned?
• How does this book relate to what you are learning about?

# Book Author Lexile Level
1 Hershey's Kisses Subtraction Book Jerry Pallotta AD530L
2 Ten Black Dots Donald Crews AD410L