Module 13: Subtract 2Digit NumbersMath 2A  Course Guide
Module Overview:
In this module, students will subtract tens to subtract twodigit numbers, subtract tens and ones using a place value chart, and use the countback strategy to subtract on a number line. They will use ten frames to subtract a onedigit number from a twodigit number and write and solve a twodigit subtraction sentence from a picture.
Module Materials:
Lesson #  Lesson Title  Material(s) 

1  Subtract Tens 
stacking blocks crayons or colored pencils pen or pencil 
2  Subtract Tens and Ones 
stacking blocks crayons or colored pencils pen or pencil 
3  Subtract from a TwoDigit Number Using a Number Line 
crayons or colored pencils pen or pencil scissors 
4  Subtract a OneDigit Number from a TwoDigit Number 
crayons or colored pencils pen or pencil 
5  ProblemSolving Strategy: Write a Subtraction Sentence 
crayons or colored pencils pen or pencil 
Module Objectives:
Lesson #  Lesson Title  Objective(s) 

1  Subtract Tens 

2  Subtract Tens and Ones 

3  Subtract from a TwoDigit Number Using a Number Line 

4  Subtract a OneDigit Number from a TwoDigit Number 

5  ProblemSolving Strategy: Write a Subtraction Sentence 

Module Key Words:
Key Words 

Whole tens Skip count Hundred chart Whole Part Placevalue chart Digit Count back Number line Ten frame Subtraction sentence Difference Subtraction strategy 
Module Assignments:
Lesson #  Lesson Title  Page #  Assignment Title 

1  Subtract Tens  4  HandsOn 
2  Subtract Tens and Ones  4  It’s Your Turn! 
3  Subtract from a TwoDigit Number Using a Number Line  4  HandsOn 
4  Subtract a OneDigit Number from a TwoDigit Number  4  HandsOn 
5  ProblemSolving Strategy: Write a Subtraction Sentence  4  HandsOn 
Learning Coach Notes:
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 

Subtract Tens 

Subtract Tens and Ones 

Subtract from a TwoDigit Number Using a Number Line 

Subtract a OneDigit Number from a TwoDigit Number 

ProblemSolving Strategy: Write a Subtraction Sentence 

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 

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 

Module Outing:
Take some time to apply what your student is learning to the real world. Suggested outings are below.
#  Outing 
