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UNPLUGGED
ForLoopFun
Lessontime:25MinutesBasiclessontimeincludesactivityonly.IntroductoryandWrap-Upsuggestionscanbeused
todelvedeeperwhentimeallows.
LESSONOVERVIEW
Weknowthatloopsallowustodothingsoverandoveragain,butnowwe’regoingtolearnhowtouseloopswith
extrastructurebuiltrightin.
TEACHINGSUMMARY
GettingStarted-15minutes
1)Review
2)Vocabulary
3)ForOneandAll
Activity:ForLoopFun-25minutes
4)ForLoopFun
Wrap-up-10minutes
5)FlashChat-Whatdidwelearn?
6)Vocab-Shmocab
Assessment-5minutes
7)ConditionalswithCardsAssessment
LESSONOBJECTIVES
Studentswill:
Determinestartingvalue,stoppingvalue,andintervalof"forloop"
Illustratethecountervalueshiteachtimethroughaforloopduringruntime
TEACHINGGUIDE
MATERIALS,RESOURCESANDPREP
FortheStudent
Dice(3perpairofstudents)
Pens&Pencils
ForLoopFunWorksheet
ForLoopFunAssessment
FortheTeacher
ThisTeacherLessonGuide
PrintoneForLoopFunWorksheetpergroup
PrintoneForLoopFunAssessmentforeachstudent
GETTINGSTARTED(20MIN)
1)Review
Thisisagreattimetoreviewthelastlessonthatyouwentthroughwithyourclass.Wesuggestyoualternate
betweenaskingquestionsofthewholeclassandhavingstudentstalkabouttheiranswersinsmallgroups.
Herearesomequestionsthatyoucanaskinreview:
Whatdidwedolasttime?
Whatdoyouwishwewouldhavehadachancetodo?
Didyouthinkofanyquestionsafterthelessonthatyouwanttoask?
Whatwasyourfavoritepartofthelastlesson??
LESSONTIP
Finishingthereviewbyaskingaboutthestudents'favoritethingshelpstoleaveapositiveimpression
ofthepreviousexercise,increasingexcitementfortheactivitythatyouareabouttointroduce.
2)Vocabulary
Thislessonhasonenewandimportantword:
ForLoop-Sayitwithme:For-Loop
Loopsthathaveapredeterminedbeginning,end,andincrement(stepinterval)
3)ForOneandAll
Ifyoudidtheoriginalloopslesson(rememberTheIteration?)youcancallbacktotheusefulnessofloopsin
general
Pointoutthattherearecertainloopsthathappenveryfrequently,forexample,loopswhereyouneedtokeep
trackofhowmanytimesyouhavebeenthrough
Sometimes,youdon'twanttostartwithone
Sometimes,youdon'twanttocountbyones
ForLoopsgiveyouapowerfulwaytokeepacounterthatstartswhenyouwant,endswhenyouwant,and
increasesbywhateversizestepthatyouwant
Here,youcanjumprightintoasampleofthegame
ACTIVITIES:(20MIN)
4)ForLoopFun
Sometimeswewanttorepeatthingsacertainnumberoftimes,butwewanttokeeptrackofvaluesaswedo.This
iswherea“forloop”comesinhandy.Whenyouuseaforloop,youknowrightfromthestartwhatyourbeginning
valueis,whatyourendingvalueis,andhowmuchthevaluechangeseachtimethroughtheloop.
Directions:
1)Dividestudentsintopairs
2)Tostarttheround,eachstudentrollsthreetimes:
-OnedietodeterminethestartingvalueofX
-ThreedicetodeterminethestoppingvalueforX
-OnedietodeterminethestepintervalofXeachtimethrough
3)Useoneoftheprovidednumberlinestotracetheforloopthatthey’vemade
-StartatthestartingvalueofX
-Countdownthenumberline,circlingthenumbersattherolledinterval
-Stopwhenyougettothepredeterminedstoppingvalue
4)Addallofthecircledvaluestoyourscore,thenlettheotherplayertakeaturn
5)Best2outof3wins
LESSONTIP
Whenyouplaythisgame,it'sasifyou'rerunningthroughalooplikethis
for(x=startValue;x<=stopValue;x=x+interval){
circlecurrentXvalue;
addcurrentXvaluetoroundScore;
}
Itmaybedifficultforyoungstudentstounderstandthiswritteninpseudocode,butitmaybehelpfultohaveyouexplainout
loud(andperhapswithadiagram)whattheywillbeusingasthecontentofaforloop.
WRAP-UP(5MIN)
5)FlashChat:Whatdidwelearn?
Whatwouldyourintervalneedtobeifyouwantedtocountfrom4to13bythrees?
Whatkindsofthingsdoyouthinkyoucoulddowithaforloop?
Canyoureproduceanormalloopusingaforloop?
Whatwouldyouneedtodo?
LESSONTIP
FlashChatquestionsareintendedtosparkbig-picturethinkingabouthowthelessonrelatestothe
greaterworldandthestudents'greaterfuture.Useyourknowledgeofyourclassroomtodecideifyou
wanttodiscusstheseasaclass,ingroups,orwithanelbow-partner.
6)VocabShmocab
Whichoneofthesedefinitionsdidwelearnawordfortoday?
"Doingsomethingmorethanoncetheexactsameway"
"Loopsthathaveapredeterminedbeginning,end,andincrement."
"Statementsthatonlyrunundercertainconditions"
...andwhatisthewordthatwelearned?
ASSESSMENT(5MIN)
7)ForLoopFunAssessment
Handouttheassessmentworksheetandallowstudentstocompletetheactivityindependentlyafterthe
instructionshavebeenwellexplained.
Thisshouldfeelfamiliar,thankstothepreviousactivities.
EXTENDEDLEARNING
Usetheseactivitiestoenhancestudentlearning.Theycanbeusedasoutsideofclassactivitiesorother
enrichment.
RunitBackward
Trythisactivityagain,butthistimehavethestartnumberbeselectedusingthreedice,andthestopnumber
withonlyone.Makesuretohaveanegativeincrement!
HopScotch
Usingchalk,drawahopscotchdiagramoutsideontheblacktop
Numberthesquaresfrombottomtotop
Havestudentsgiveeachotherastartsquare,stopsquare,andhowmanyatatimetheyneedtojump
Whenthejumperisdone,havethemwritedownthelooptheyjustperformed
Startaddingadditionalactivitiestobedoneateachsquare,thiswilladdcomplexitytothewrittenportion,as
well
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