# ALEX Lesson Plan

## "Introducing Pi!"

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This lesson provided by:
 Author: Melissa DeBacker System: Huntsville City School: Mountain Gap P-8
General Lesson Information
 Lesson Plan ID: 6813 Title: "Introducing Pi!" Overview/Annotation: The overriding purpose of the lesson is to actively engage students in learning activities that promote opportunities for students to discover the 'meaning' of pi. Activities will include research, hands-on, software applications, reading, writing, and collaborative work opportunities. The secondary purpose is to introduce and spark enthusiasm among students for our celebration of 'Pi Day'.
Associated Standards and Objectives
Content Standard(s):
 MA2015 (6) 13. Write, read, and evaluate expressions in which letters stand for numbers. [6-EE2] a. Write expressions that record operations with numbers and with letters standing for numbers. [6-EE2a] Example: Express the calculation, "Subtract y from 5," as 5 - y. b. Identify parts of an expression using mathematical terms (sum, term, product, factor, quotient, coefficient); view one or more parts of an expression as a single entity. [6-EE2b] Example: Describe the expression 2(8 + 7) as a product of two factors; view (8 + 7) as both a single entity and a sum of two terms. c. Evaluate expressions at specific values of their variables. Include expressions that arise from formulas used in real-world problems. Perform arithmetic operations, including those involving whole-number exponents, in the conventional order when there are no parentheses to specify a particular order (Order of Operations). [6-EE2c] Example: Use the formulas V = s3 and A = 6s2 to find the volume and surface area of a cube with sides of length s = 1/2. MA2015 (7) 14. Know the formulas for the area and circumference of a circle, and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle. [7-G4]

Local/National Standards:

Primary Learning Objective(s):

The students will be able to convey their discovery of the 'meaning' of pi: Through the evidence obtained in the hands on activity the students will hypotheses that the ratio of the circumference to the diameter of any circle is about 3.14.

The lesson provides reinforcement and practice of the following previously acquired skills and terms: Ratio: writing as decimal Centimeter Quotient Rounding Using a calculator Using a ruler Working together Expression Substitution Summarization Reading/writing Translating words to an expression Mean, mode, median, range Software applications: power point excel word

Preparation Information
 Total Duration: Greater than 120 Minutes Materials and Resources: paper, pencil, centimeter ruler, string circular items, calculator Technology Resources Needed: Computer, printer, paper, internet access, microsoft word, excel, powerpoint Background/Preparation: Gather material for hands on activity. Prepare a sample power point presentation, word and excel spreadsheet. Research Pi on the internet and document appropriate websites. Generate rubrics for assessment. Schedule computer lab days.
Procedures/Activities: