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Lesson Plan Elements
Name: Heather Wright Date: 3.18.08
Subject: 6thGrade Math Time: 60 minutes
Purpose of Lesson:
To teach students the proper use of protractors
EALR:
Objective:
Students wi !e a!e to identif" and measure anges using a protractor
Materials/Tecnolo!"/Me#ia:
#rotractor $for each student%
&ournas for note ta'ing
Ange Wor'sheets ()*
(ocument +amera,#ro-ector
T$M
E
$NTROD%&T$ON 'ncude a statement of the o!-ecti/e and chec' that students can
state the o!-ecti/e. Might aso incude hoo' rationae !ac'ground 'nowedge re/iewand assessment of pre)s'is%
As we continue to prepare for the WAS this month toda" we are going to re/iew
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As we continue to prepare for the WAS this month toda" we are going to re/iew
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T$ME $NSTR%&T$ON
#ass out 9oca!uar": Wor'sheet and Measuring an Ange: Wor'sheet for students to
ta'e notes on throughout the esson. $Wor'sheets ; < =%
;/er"one shoud ha/e a protractor in front of "ou. #ease gra! one and we wi name
and a!e the parts.
#ace Wor'sheet (: underneath the #ocument cameraas "ou point to the parts of theprotractor. =i out the 9oca!uar": wor'sheet usin! te camera as the students foow
aong.
#arts of the #rotractor
>uter Scae)The num!ers on the outer edge of the protractor
nner Scae)The num!ers on the inner edge of the protractor
+enter Mar')Awa"s at the midde of the ?ero);dge
?ero);dge)Awa"s at the same e/e as the 0@ mar'
$ DO:
Measuring an Ange 'MODEL ($T) AN A&T%AL PRO&TRA&TOR* %S$N+ T)EDO&%MENT &AMERA* AS ,O% +O T)RO%+) EA&) STEP- and guide students
as the" fi in their measuring an ange: wor'sheet.
ST;# 12 (etermine if the ange is acute of o!tuse !efore using the protractor
ST;# 2 #ace the center mar' of the protractor on the /erte5 of the ange
ST;# 32 *otate the Bero edge of the protractor to ine up with one ra" of the ange
and for the other ra" of the ange to cross the protractors scae
ST;# C2 *ead the measure of the ange of the ra" that crosses the protractors scae
+ommon Mista'es2 $#ace Wor'sheet & under #ocument camera%
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(E DO: #ass out Wor'sheet >:
Students can wor' with partners and ta'e turns in measuring the anges on the
wor'sheets.
Wa' around the cassroom as students wor'
After enough time has !een pro/ided to compete the wor'sheet pace Wor'sheet
>: under the #ocument camera. As' for /ounteers to come up and demonstratehow to use the protractor to measure random pro!ems on the wor'sheet.
As students demonstrate at the front the cass wi ha/e a chance to critiFue their
techniFue as the" watch through the #ocument camera.#ictures2
#ace photos $Wor'sheets #)*% under the #ocument cameraand ha/e students
/ounteer to find an ange on the photo outine it with a highighter name it and
measure it.
This pro/ides another opportunit" for more students to come and demonstrate their
ange measuring a!iities aong with gi/ing the cass more opportunities to watch
and critiFue their techniFue.
,O% DO:#ass out the fina wor'sheet for students to wor' on indi/idua" aowing them to show
what the" 'now,understand from the esson that was gi/en. >nce students are finished the"
can turn their wor'sheet in to !e corrected.
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Inner Outer Scale
Zero-Edge Center Mark
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Step One Step Two
Step Step Four
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Step 1) Determine i the angle i! acute or o"tu!e "eoreu!ing the protractor#
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Step $) %lace the center mark o the protractor onthe
&erte' o the angleStep () otate the *ero-edge o the protractor to line
up with
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one ra+ o the angle and or the other ra+ o theangle to
cro!! the protractor,! !cale#
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Step ) ead the mea!ure o the angle o the ra+ that
cro!!e! the protractor,! !cale#
Common Mistakes
1) .!ing the incorrect !cale#
$) The center mark i! not on the &erte'#
Thi! u!uall+ happen! ater rotating theprotractor#Make !ure ater rotating the protractor thatthe center mark i! !till on the &erte'#
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() Counting the mark! in the wrong direction#%a+ attention to whether the num"er! areincrea!ing or decrea!ing#
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Use you protractor to extend the lines and measure each angle.
1 3
C 6
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10 11 1
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