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Main Curriculum Tie:
Background For Teachers:
Starter: Find the answers
Circle the expression(s) or model with the greatest value in each problem below.
Lesson Segment 1: How is n² related to √n²? How is n² different from 2n?
How is n³ different from 3n?
Briefly review with students how to write a base number and an exponent. Students have used this notation since 5th grade. Show students how to use the 6 or 7 keys on a Ti-73 to write exponential expressions. Have them use the calculator and the attached Foldable Perfect Squares and Square Roots to build a table of values. Copy the foldable to make two sided page that will be folded in thirds on the dotted line.
Have students work with partners to complete the investigation, “Operations and Exponents”. Discuss possible answers to question # 4 and 5 on the investigation. Handout the journal page for exponents (attached).
Lesson Segment 2: What are some real-world applications for exponential
notation? How is n² related to √n² ?
Lesson Segment 3: Practice and application
The links on the District Math Page have some great examples of where exponents are used in the real world. Area, Volume, Scientific Notation, Biology, Astronomy, earthquake (Richtor Scale). You may want to assign students to find a real world example to bring to class.
Game: Playing With Powers
Assign students the attached Exponential Expressions practice attached, or appropriate
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