Module 9: Add TwoDigit Numbers to OneDigit NumbersMath 2A  Course Guide
Module Overview:
In this module, students will add tens to practice adding twodigit numbers, make tens from ones to add, use the counton strategy to add to a twodigit number. They will use a ten frame to add a twodigit number to a onedigit number, write and solve a twodigit addition sentence from a picture, and choose an addition strategy to solve.
Module Materials:
Lesson #  Lesson Title  Material(s) 

1  Add Tens 
Baseten blocks (rods) Crayons (orange, yellow, red) 
2  9.2 Regroup Ones as Tens  baseten blocks (rods and unit cubes); 
3  Add to a TwoDigit Number Using a Number Line  Counters; 
4  Add a OneDigit Number to a TwoDigit Number 
50 counters (2 colors) Scissors Crayons (red and blue) 
5  ProblemSolving Strategy: Write an Addition Sentence 
Baseten blocks Counters 
Module Objectives:
Lesson #  Lesson Title  Objective(s) 

1  Add Tens 

2  9.2 Regroup Ones as Tens 

3  Add to a TwoDigit Number Using a Number Line 

4  Add a OneDigit Number to a TwoDigit Number 

5  ProblemSolving Strategy: Write an Addition Sentence 

Module Key Words:
Key Words 

Estimate Round Regrouping Number line Counting on Ten frame Placevalue chart Addend Sum Addition strategy 
Module Assignments:
Lesson #  Lesson Title  Page #  Assignment Title 

1  Add Tens  4  HandsOn 
2  9.2 Regroup Ones as Tens  4  HandsOn 
3  Add to a TwoDigit Number Using a Number Line  4  HandsOn 
4  Add a OneDigit Number to a TwoDigit Number  4  HandsOn 
5  ProblemSolving Strategy: Write an Addition Sentence  4  HandsOn 
Learning Coach Notes:
Lesson #  Lesson Title  Notes 

1  Add Tens  Ask your student to explain the ways they learned to add tens. 
2  9.2 Regroup Ones as Tens  Ask your student to describe what regrouping is and how to regroup ones as tens. 
3  Add to a TwoDigit Number Using a Number Line  Ask your student to explain how to use a number line to add twodigit numbers. 
4  Add a OneDigit Number to a TwoDigit Number  Ask your student to explain how using a ten frame and place value chart can help them add a onedigit number to a twodigit number. 
5  ProblemSolving Strategy: Write an Addition Sentence  Ask your student to describe the different addition strategies they learned in this module. 
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 

Add Tens 

9.2 Regroup Ones as Tens 

Add to a TwoDigit Number Using a Number Line 

Add a OneDigit Number to a TwoDigit Number 

ProblemSolving Strategy: Write an Addition 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 
