Subitizing

How many?

Can animals count?

Five  Animals  Who  Can  Count  1.  Chimpanzees  2.  Robins  3.  The  domes<c  chicken  4.  Rhesus  monkeys  5.  Ants  6.  …and  many  more  

hEp://www.care2.com/causes/5-­‐animals-­‐who-­‐can-­‐count.html?page=1    

Can animals subitize?

hEp://www.youtube.com/watch?v=HfoQEUm4drk   hEp://www.youtube.com/watch?v=ZnqUAsyOTv4#t=162  

Fish  can  choose  the  right  amount  of  shapes  displayed  over  a  hole  to  get  their  treats  in  a  

path.    

Crows  know  that  danger  s<ll  lurks  if  one  human  goes  behind  a  screen  and  doesn’t  

come  out.    

Objects needed: •  A number of identical things

of different colors.

•  A sheet of construction paper or cardboard.

Discovery 1

Can you subitize?

Can you subitize?

Can you subitize?

Can you subitize?

Which numbers did you always get right?

Examples  only.  Random  means  no  order.  

Does the research hold?

Did  it  get  harder  and  take  longer  when  there  were  more   ?  

Excerpt  from  Dehaene,  S.  (1997).  The  number  sense:  How  the  mind  creates  mathema4cs.  Oxford  University  Press.    

House Hunt

Discovery 2

Can you subitize?

Can you subitize?

Can you subitize?

Can you subitize?

Which numbers did you always get right? Did organizing

make it quicker?

Examples  only.  PaEerns  may  differ.  

Were these random or organized in this

graph?

Did  your  response  

<mes  change  when  you  organized?  

Excerpt  from  Dehaene,  S.  (1997).  The  number  sense:  How  the  mind  creates  mathema4cs.  Oxford  University  Press.    

Discovery 3

Discovery 3

Discovery 3

Discovery 3

Words/Concepts  

Subi2zing  Webpages  Ac2vi2es  

•  Dot  Cards  –  hEp://www.slideshare.net/khrycan/dot-­‐cards    

•  Subi<zing  Videos  –  hEp://www.slideshare.net/khrycan/dot-­‐cards    

•  Coun<ng  Challenge  –  hEp://www.intmath.com/numbers/coun<ng-­‐

game.php    

•  Count  the  Dots  –  hEp://news.bbc.co.uk/2/hi/uk_news/6577241.stm    

•  Pre-­‐K  Pages  -­‐Games  –  hEp://www.pre-­‐kpages.com/subi<zing/  

•  Domino  Game  –  hEp://michellef.essdack.org/?q=node/127    

References  •  What  is  Subi<zing?  

–  hEp://www.coun<ngtogether.com/educators.htm    

•  Subi<zing  Defini<on  –  hEp://www.kensmath.com/kens-­‐math-­‐program/

subi<zing/    

•  Number  Sense  –  hEp://specialed.about.com/od/mathfounda<ons/

a/Subi<zing-­‐A-­‐Skill-­‐That-­‐Leads-­‐To-­‐Strong-­‐Number-­‐Sense.htm    

•  Be  wise...Subi<ze  –  hEp://mathcoachscorner.blogspot.com/2012/01/be-­‐

wisesubi<ze.html    

 And  many  more…