Lesson 2
Powers of 10
Lesson Purpose
The purpose of this lesson is for students to recognize exponential notation for powers of 10 and use exponential notation to represent large numbers.
Lesson Narrative
In the previous lesson, students multiplied and divided numbers by 10 or 100 and noticed place value patterns and relationships. This lesson continues to look at patterns when several factors of 10 are multiplied together. It also introduces a convenient strategy for recording these numbers, exponential notation for positive powers of 10. Students represent numbers up to 1,000,000,000 and apply their understanding of multiplication by 10 and its powers to see why exponential notation is a convenient way to represent certain large numbers. This lesson includes an optional activity that allows students to explore the number 1 trillion.
 Engagement
 MLR2
Activity 1: Population of Delaware and India
Learning Goals
Teacher Facing
 Use wholenumber exponents to denote powers of 10.
Student Facing
 Let’s use exponents to show powers of 10.
Required Preparation
Lesson Timeline
Warmup  10 min 
Activity 1  20 min 
Activity 2  15 min 
Activity 3  10 min 
Lesson Synthesis  10 min 
Cooldown  5 min 
Teacher Reflection Questions
What unfinished learning or misunderstandings do you have about powers of 10 and exponential notation? How can you leverage those partial understandings in a positive way to further the understanding of the class?
Suggested Centers
 Number Puzzles: Multiplication and Division (4–5), Stage 2: Multidigit Factors (Supporting)
 Five in a Row: Multiplication (3–5), Stage 3: Twodigit Factors (Supporting)
Print Formatted Materials
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Additional Resources
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