mag s2 128 · 2019. 11. 17. ·...

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Introductory Ac,vity ProcessRevisit and Consolida,on Ac,vity Revisit the concept of es.ma.on and how to round decimal frac.ons to a whole number Learning inten,on: Learners can round decimal frac,ons to whole numbers (6.25 rounded to 6.00). Students work in small groups. Make It (Yellow and Red Fish): Learners work in small groups or pairs to sort a set of decimal frac.on cards between two whole numbers (to hundredths/thousandths) and determine whether the decimal frac.on should be rounded up or down to whole number, tenths, or hundredths. Learners have an allocated .me to sort as many cards as possible (either round up or down) and then .med to order the cards in ascending order. Groups/pairs rotate. Write It : Write the set of decimal frac.ons in ascending order or descending order. Explain It (Green Fish): Explain group findings by answering the following ques.ons: When do you round up? When do you round down? Which digit determines whether your round up or down? Why did one group decide to round 6.38 up to 7 instead of rounding down to 6? Forma=ve Assessment: (Checkout Strategy The Checkout Strategy is a transi.onal ac.vity that can be used for forma.ve assessment. It could be as students leaves the classroom or moves to another ac.vity. A quick, simple ques.on or task is given to them and the teacher observes their level of understanding on a given topic. As examples, students could show their answer on their whiteboards, write it on a s.cky note or orally explain on their way out.) Teacher displays a decimal frac.on (IWB or flashcard) and students iden.fy whether the number rounds up or down thumbs up = round up Leraners line up and teacher asks individuals to state what a given decimal frac.ons rounds to = exit slip Quick observa.on of individual success. . Australian Curriculum Indicator YR 6 Add and subtract decimals, with and without digital technologies, and use es.ma.on and rounding to check the reasonableness of answers (ACMNA128). Key Ideas Understand that the base 10 number system can be extended to thousandths (to the right the units are decreasing in value in powers of 10 1). There are numbers between consecu.ve whole numbers (1.1., 1.2, 1.3). Understand that numbers are par..oned into smaller and smaller units when working with decimals and frac.ons. Understand how decimal numbers to thousandth can be added and subtracted. Use digital technologies to assist applica.on. Explore es.ma.on and rounding to check for reasonableness of answers. Resources FISH, paper, laminated decimal frac.on flash cards, laminated hundred grid (0.011), laminated number line, money problem solving tasks, calculators (to be used at the teacher’s discre.on) Vocabulary Decimal, place value, tenths, hundredths, thousandths, decimal point, whole numbers, rounding, es.ma.ng, comparing, ordering, reasonableness, ascending, descending, budget, economical, jus.fy.

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Page 1: MAG S2 128 · 2019. 11. 17. · Or!Learners.line!up!and!teacher!asks!individuals!to!es.mate!the!answer!of!adding!two!decimal!frac.ons! together.!!!! Quick!observaon!of!individual!success.!!!

               Introductory  Ac,vity  Process-­‐Revisit  and  Consolida,on  Ac,vity  Revisit  the  concept  of  es.ma.on  and  how  to  round  decimal  frac.ons  to  a  whole  number        Learning  inten,on:    Learners  can  round  decimal  frac,ons  to  whole  numbers  (6.25  rounded  to  6.00).    Students  work  in  small  groups.        Make  It  (Yellow  and  Red  Fish):  Learners  work  in  small  groups  or  pairs  to  sort  a  set  of  decimal  frac.on  cards  between  two  whole  numbers  (to  hundredths/thousandths)  and  determine  whether  the  decimal  frac.on  should  be  rounded  up  or  down  to  whole  number,  tenths,  or  hundredths.    Learners  have  an  allocated  .me  to  sort  as  many  cards  as  possible  (either  round  up  or  down)  and  then  .med  to  order  the  cards  in  ascending  order.  Groups/pairs  rotate.      Write  It  :  Write  the  set  of  decimal  frac.ons  in  ascending  order  or  descending  order.        Explain  It  (Green  Fish):    Explain  group  findings  by  answering  the  following  ques.ons:                                  When  do  you  round  up?  When  do  you  round  down?                                    Which  digit  determines  whether  your  round  up  or  down?                                                              Why  did  one  group  decide  to  round  6.38  up  to  7  instead  of  rounding  down  to  6?      Forma=ve  Assessment:    (Checkout  Strategy-­‐  The  Checkout  Strategy  is  a  transi.onal  ac.vity  that  can  be  used  for  forma.ve  assessment.    It  could  be  as  students  leaves  the  classroom  or  moves  to  another  ac.vity.    A  quick,  simple  ques.on  or  task  is  given  to  them  and  the  teacher  observes  their  level  of  understanding  on  a  given  topic.    As  examples,  students  could  show  their  answer  on  their  whiteboards,  write  it  on  a  s.cky  note  or  orally  explain  on  their  way  out.)    Teacher  displays  a  decimal  frac.on  (IWB  or  flashcard)  and  students  iden.fy  whether  the  number  rounds  up  or  down  -­‐  thumbs  up  =  round  up  Leraners  line  up  and  teacher  asks  individuals  to  state  what  a  given  decimal  frac.ons  rounds  to  =  exit  slip      Quick  observa.on  of  individual  success.            .      

Australian  Curriculum  Indicator  YR  6  Add  and  subtract  decimals,  with  and  without  digital  technologies,  and  use  es.ma.on  and  rounding  to  check  the  reasonableness  of  answers  (ACMNA128).        Key  Ideas  •  Understand  that  the  base  10  number  system  can  be  

extended  to  thousandths  (to  the  right  the  units  are  decreasing  in  value  in  powers  of  10-­‐  1).  

•  There  are  numbers  between  consecu.ve  whole  numbers  (1.1.,  1.2,  1.3).  

•  Understand  that  numbers  are  par..oned  into  smaller  and  smaller  units  when  working  with  decimals  and  frac.ons.      

•  Understand  how  decimal  numbers  to  thousandth  can  be  added  and  subtracted.  

•  Use  digital  technologies  to  assist  applica.on.  •  Explore  es.ma.on  and  rounding  to  check  for  

reasonableness  of  answers.      Resources                                          FISH,  paper,  laminated  decimal  frac.on  flash  cards,  laminated  hundred  grid  (0.01-­‐1),  laminated  number  line,  money  problem  solving  tasks,  calculators  (to  be  used  at  the  teacher’s  discre.on)        Vocabulary  Decimal,  place  value,  tenths,  hundredths,  thousandths,  decimal  point,  whole  numbers,  rounding,  es.ma.ng,  comparing,  ordering,  reasonableness,  ascending,  descending,  budget,  economical,  jus.fy.      

                                                                             

 

Page 2: MAG S2 128 · 2019. 11. 17. · Or!Learners.line!up!and!teacher!asks!individuals!to!es.mate!the!answer!of!adding!two!decimal!frac.ons! together.!!!! Quick!observaon!of!individual!success.!!!

Write  It:  Learners  complete  money  problem  solving  cards/tasks    Learners  es.mate  a  reasonable  answer  prior  to  solving  the  problem      Explain  It:  Explain  strategies  used  and  the  reasonableness  of  es.mates      Repeat  ac.vity  using  measurement  -­‐  length,  area,  mass,  volume        Extensions  and  Varia,ons  (Differen,a,on)  Budge.ng  Inves.ga.on  -­‐  students  are  asked  to  budget  for  two  different  shopping  scenarios  (reference:  Shopping  Challenges  -­‐  adaped  from  Primary  Resources  site  www.primaryresources.co.uk/maths/docs/shopping_challenges.doc  Budge.ng  Inves.ga.on  -­‐  MoneySmart  Program  Year  6  ‘FUN  DAY  OUT’  hgps://www.moneysmart.gov.au/teaching/teaching-­‐resources/digital-­‐ac.vity-­‐fun-­‐day-­‐out    Differen,a,on:  Focus  Group:    Students  who  are  iden.fied  through  forma.ve  assessment  (checkout  points  and  observa.on)  as  not  yet  understanding  the  learning  inten.on  will  go  into  a  focus  group.    In  that  focus  group,  learning  will  be  focused  on  the  gaps  iden.fied  in  class.    Focus  ac.vi.es  simplify  money  problems,  work  in  pairs,  work  with  actual  play  money      Assessment-­‐Where  in  the  learning  cycle?  •  Forma.ve  assessment-­‐  checkouts,  explana.on  opportuni.es  and  group  

tasks  

•  Summa.ve  Assessment-­‐  adding  and  subtrac.ng  algorithms  using  es.ma.on  strategies  to  check  on  the  reasonableness  of  solu.ons  and  comple.ng  individual  tasks  

•  Higher  Order  Thinking  opportuni.es  through  CHALLENGE  tasks            

Ac,vity  Process-­‐Rounding    Learning  inten,on:    Learners  can  round  decimal  frac,ons  to  whole  numbers  to  es,mate  an  approximate  answer  for  addi,on  and  subtrac,on  equa,ons.    Learners  work  in  small  groups.        Make  It  (Yellow  and  Red  Fish):  (reference  decimal  frac=on  flash  cards)    Using  the  decimal  frac.on  cards,  from  the  previous  ac.vity,  learners  select  two  cards,  es.mate  the  addi.on  or  subtrac.on,  by  rounding  the  decimal  frac.on  up  or  down  to  a  whole  number      Write  It  :  Write  an  algorithm  to  prove  the  reasonableness  of  the  es.ma.on        Explain  It  (Green  Fish):    Explain  group  findings  by  answering  the  following  ques.ons:                                  Explain  why  the  es.ma.on  was  reasonable  or  not.                                    Explain  why  an  es.ma.on  may  be  too  high  or  too  low  (e.g.  6.49  +  6.95  =  )        Repeat  for  different  addi.on  and  subtrac.on  equa.ons  EXTENSION:  Repeat  above  ac.vi.es  with  decimal  frac.ons  to  thousandths.        Forma=ve  Assessment:    (Checkout  Strategy-­‐,  Learners  could  show  an  answer  to  a  ques.on    on  their  whiteboards,  write  it  on  a  s.cky  note  or  orally  explain  on  their  way  out.)  Or  teacher  displays  a  decimal  frac.on  (IWB  or  flashcard)  and  students  iden.fy  whether  the  number  rounds  up  or  down  -­‐  thumbs  up  =  round  up  Or  Learners.line  up  and  teacher  asks  individuals  to  es.mate  the  answer  of  adding  two  decimal  frac.ons  together.        Quick  observa.on  of  individual  success.      Ac,vity  Processes-­‐  Working  with  Money  (reference:  Money  Problems  -­‐  adapted  from  www.primaryresources.co.uk/maths/mathsD2.htm    Learning  inten=on:  Learners  can  solve  money  problems  using  efficient  addi.on  and  subtrac.on  strategies  when  working  with  decimal  frac.ons,  having  rounded  and  es.mated    an  approximate/reasonable  answer  first.        BIG  QUESTIONS:    Do  I  have  enough  money?    How  much  money  would  I  need?