Lesson: Irrational Numbers Lesson 4

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Lesson Objective

SWBAT plot irrational numbers on a number line, using whole number benchmarks.

Lesson Plan

Teacher: Meyer, Siesfeld

Subject: Algebra

Grade: 8

Unit:    Expressions

Week:  9/20-9/24

Day

Monday, September 20, 2010

BPCPS Standard(s)

8AL.EX.02 Irrational Numbers

Students will classify numbers as rational or irrational, simplify irrationals, and order them by plotting them on a number line.

Objective(s)

SWBAT plot irrational numbers on a number line, using whole number benchmarks.

Do Now

Three simplifying irrationals problems

 

<<Call to Begin>> Today we’re going to talk how to estimate the value of an irrational number after we have simplified it.  We will be building on the two rules we learned last week.  What were those rules? <<product rule and quotient rule>>

<<MM>>  integer addition

Do Now Review

Go over three problems quickly.

Learning Activities (group, independent, guided reading)

Class Notes

-          Since any irrational number can be approximated as a decimal, any irrational number can be approximately placed on a number line.

-          Ask students about pi and plotting this number.

-          Three Steps for plotting irrationals:

1. Write the irrational number in its simplest form using the product rule and/or the quotient rule

2. Find the approximate value of the irrational number, using perfect squares to guide your approximation

3. Place the approximate value on the number line

-           Complete simple example, then one with quotient rule, one application ordering question

-          Encourage students to use their notes from Thurs and Friday to help them with quotient and product rule.

-          To order irrationals, plot on the number line and use this to help you order them.

Independent Practice:

-          Students should use notes to help with product an quotient rule

-          Once notes are complete, students should complete CW independently.

-          They should work on the application problems after completing through question 5,then return to 6-8.

-          Circulate to check off correct answers.

 

Closing

What are the three steps to plotting irrationals?

What is the first step if you are asked to order irrationals?

Assessment

Grade HW

Homework

HW worksheet similar to CW

Materials

On server

Accommodations 

 

Requests for Feedback

 

Comments for Co Teaching (if app)

 

Lesson Resources

20100920 HW Plotting Irrationals Scanned.PDF  
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20100920 Teacher Key.PDF  
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20100920 CN CW Irrational Numbers.doc  
533
20100920 CW Plotting Irrationals Scanned.PDF  
394
20100920 HW Irrational Numbers Original.docx  
390
20100920 HW Irrational Numbers Original_acc.docx  
216

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