Addition and Subtraction

• Adding Three-Digit Numbers
  Step-by-Step Exercise
• Add 3-Digit Numbers
  Printable Worksheet - Example: 534+732
• Subtract 3-Digit Numbers
  Printable Worksheet - Example: 734-432

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Rounding and Estimates

• Estimates
  Short Lesson
• Rounding to the Nearest Ten
  Lesson and Practice
• Rounding to the Nearest Ten 1 
  Tile Game Practice
• Rounding to the Nearest Ten 2 
  Tile Game Practice

- Tablet-friendly activity

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Multiplication

• Multiplication Table Practice
  Memory Game
• Multiplying 2-Digit Numbers
  Step-by-Step Lesson
• Multiplying 2-Digit Numbers
  Step-by-Step Exercise
• Order of Operations
  Mystery Picture Game - Example: 5+7x2-2

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Number Sense

• Thousands
  Introduction to place values - Step-by-step lesson and practice exercises

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Division

• Division Practice
  Mystery Picture Game
• Order of Operations
  Mystery Picture Game - Example: 18+10:5

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Measures

Length - U.S. Standard Units

• Basic Facts 1 - Printable Worksheet
• Basic Facts 2 - Printable Worksheet
• Mixed Problems - Printable Worksheet
• Addition - Printable Worksheet

Length - Metric Units

• Basic Facts 1 - Printable Worksheet
• Basic Facts 2 - Printable Worksheet

Time Units

• Basic Facts 1 - Printable Worksheet

Fractions

• Proper and Equivalent Fractions, Mixed Numbers, Ordering Fractions
  Lesson and Quiz
• Finding Equivalent Fractions
  Practice Exercise
• Ordering Fractions
  Practice Exercise

Math Challenge

• New Math Challenge Problem

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