Unit 3: Stories with Addition and Subtraction

Lesson 1:  Modeling Addition with Place Value Blocks and Drawings

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3rd Grade Unpacking Document

• I can model addition with regrouping in any place using base ten blocks and drawings and determine the reasonableness of my answer. 

• Video Links

  • WCPSS: Addition with regrouping (three digit)

• Virtual Manipulatives

  • Number Pieces

Lesson 2:  Modeling Addition with Regrouping Place Values

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3rd Grade Unpacking Document

• I can model addition with regrouping across two place values (ones and tens) and determine the reasonableness of my answer. 

• Video Links

  • WCPSS: Addition with regrouping (three digit)

• Virtual Manipulatives

  • Number Pieces

Lesson 3:  Modeling Subtracton with Place value Blocks and Drawings

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3rd Grade Unpacking Document

• I can model subtraction with ungrouping in any place using base ten blocks and drawings and determine the reasonableness of my answer.

• Video Links

  • WCPSS: Subtraction with Ungrouping

• Virtual Manipulatives

  • Number Pieces

Lesson 4:  Modeling Subtraction with Ungrouping Place Values

NC.3.NBT.2

3rd Grade Unpacking Document

• I can model subtraction with ungrouping in two place values (hundreds and tens) and check for the reasonableness of my answer. 

• Video Links

  • WCPSS: Subtraction with Ungrouping

• Virtual Manipulatives

  • Number Pieces

Lesson 5: Finding Sums using the Expanded Method

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3rd Grade Unpacking Document

• I can use the expanded form to decompose numbers and then find sums for addition and check for the reasonableness of my answers. 

• Video Links

  • WCPSS: Expanded Form Addition

  • LearnZillion: Expanded Form Addition

• Virtual Manipulatives

  • Number Pieces

  • Place Value Cards 

Lesson 6: Practice with Estimation & The Expanded Method to Find Sums

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3rd Grade Unpacking Document

• I can use expanded form to decompose numbers to find sums for addition and assess my reasonableness. 

• Video Links

  • WCPSS: Expanded Form Subtraction

  • Learn Zillion: Expanded Form Subtraction

• Virtual Manipulatives

  • Place Value Cards

Lesson 7: Finding Differences Using the Expanded Method

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3rd Grade Unpacking Document

• I can use the expanded form to decompose numbers and then find differences for subtraction.

• I can check the reasonableness of my answers. 

• Video Links

  • WCPSS: Expanded Form Subtraction

  • Learn Zillion: Expanded Form Subtraction

• Virtual Manipulatives

  • Place Value Cards

Lesson 8: Explain Subtraction Using the Expanded Method

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3rd Grade Unpacking Document

• I can explain the expanded method to solve for subtraction and determine the reasonableness of solutions. 

• Video Links

  • WCPSS: Expanded Form Subtraction

• Virtual Manipulatives

  • Place Value Cards

Lesson 9: Practice Using the Expanded Method

NC.3.NBT.2

3rd Grade Unpacking Document

• I can use the expanded form to solve for subtraction and determine the reasonableness of my answers. 

• Video Links

  • WCPSS: Expanded Form Subtraction

• Virtual Manipulatives

  • Place Value Cards

Lesson 10: Addition on a Number Line

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3rd Grade Unpacking Document

• I can model addition using a number line with accuracy. 

• Video Links

  • WCPSS: Addition on a Number Line

• Virtual Manipulatives

  • Number Line

Lesson 11: Subtraction on a Number Line

NC.3.OA.8

NC.3.NBT.2

3rd Grade Unpacking Document

• I can model subtraction using a number line with accuracy. 

• Video Links

  • WCPSS: Subtraction on a Number Line

• Virtual Manipulatives

  • Number Line

Lesson 12: Inverse Operations on a Number Line

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NC.3.NBT.2

3rd Grade Unpacking Document

• I can estimate and solve addition and subtraction inverse operations using two different strategies. 

• Video Links

  • WCPSS: Rounding

  • NumbeRock: Rounding Numbers

  • WCPSS: Using the Relationship Between Addition and Subtraction

• Virtual Manipulatives

  • Number Pieces

  • Place Value Cards

  • Number Line

Lesson 13: Exploring the Concept of Estimation

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3rd Grade Unpacking Document

• I can explore various estimation strategies to assess the reasonableness of answers. 

• Video Links

  • 3 Strategies for Estimation

• Technology Links

  • PBS Kids CyberChase Estimation

  • ABCya How Many Marbles 

Lesson 14: Estimation is Approximation

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3rd Grade Unpacking Document

• I can use estimation strategies to assess the reasonableness of answers in two-step word problems.

• Video Links

  • How to Solve a Two-Step Problem Using the Three Reads Strategy

  • How to Solve Word Problems with Bar Models

  • Bar Model for Beginners

• Technology Links

  • ABCya Rounding Numbers

Lesson 15: Solving Simple Problem Situations

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3rd Grade Unpacking Document

• I can determine if a problem requires an estimate or an exact answer.

• Video Links

  • Learn Zillion Determine Appropriate Level of Accuracy

• Virtual Manipulatives

  • Spinner

Lesson 16: More Solving Simple Problem Situations

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NC.3.NBT.2

3rd Grade Unpacking Document

• I can accurately solve simple two-step problem situation involving mixed operations. 

• Video Links

  • How to Solve a Two-Step Problem Using the Three Reads Strategy

  • How to Solve Word Problems with Bar Models

  • Bar Model for Beginners

• Virtual Manipulatives

  • Number Pieces

  • Place Value Cards

  • Number Line

Lesson 17: Solving Complex Problem Situations

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3rd Grade Unpacking Document

• I can solve problems involving comparison situations with an equation using a symbol for unknown. 

• Video Links

  • Khan Academy Comparison Word Problems

Lesson 18: Math-Libs Solving Two-Step Word Problems

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NC.3.NBT.2

3rd Grade Unpacking Document

• I can create and solve two-step word problems involving addition and subtraction. 

• Video Links

  • How to Solve a Two-Step Problem Using the Three Reads Strategy

  • How to Solve Word Problems with Bar Models

  • Bar Model for Beginners

• Virtual Manipulatives

  • Number Pieces

  • Place Value Cards

  • Number Line

Lesson 19: Story Problem Sort and Solve

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3rd Grade Unpacking Document

• I can sort and solve word problems explaining strategies and solutions. 

• Video Links

  • How to Solve a Two-Step Problem Using the Three Reads Strategy

  • How to Solve Word Problems with Bar Models

  • Bar Model for Beginners

• Virtual Manipulatives

  • Number Pieces

  • Place Value Cards

  • Number Line

Lesson 20: Making Sense of Sharing Strategies

NC.3.OA.8

NC.3.NBT.2

3rd Grade Unpacking Document

• I can solve word problems explaining strategies and solutions.

• Video Links

  • How to Solve a Two-Step Problem Using the Three Reads Strategy

  • How to Solve Word Problems with Bar Models

  • Bar Model for Beginners

• Virtual Manipulatives

  • Number Pieces

  • Place Value Cards

  • Number Line