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Snowball Discussion Technique October 2010 Website FINAL

Date post: 01-Oct-2014
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Objec&ve  

 Par%cipants  will  use  the  Snowball  technique  to  generate  ideas  with  suppor%ng  jus%fica%on  in  order  to  solve  a  problem.  

Discussion  Technique:  Snowball  

•  Allows  quieter  students  to  voice  their  opinions  in  smaller  groups  and  build  up  to  a  whole-­‐class  discussion  

•  Directs  discussion  for  complex  problem-­‐solving  

Discussion  format  

Scenario  

       There  is  a  category  five  hurricane  (similar  to  Katrina)  approaching  a  major  city  on  the  Gulf  Coast.    The  civil  engineers  who  constructed  the  levees  are  standing  by  with  five  days  to  design  a  test  to  evaluate  whether  it  meets  the  design  specifica%ons.    Within  the  five  days  they  must  use  the  results  to  modify  the  prototype  to  op%mize  the  solu%on.      

On  day  two,  the  engineering  team  must  communicate  the  design  through  a  wriMen,  oral,  or  visual  presenta%on  to  the  Federal  Emergency  Management  Agency  (FEMA).    By  day  four,  the  team  must  develop  plans  including  drawing  measurements  and  details  of  construc%on,  and  construct  a  model  of  the  solu%on.  

Problem  

In  the  past,  the  levees  have  been  able  to  withstand  the  force  of  category  4  storms  and  below,  but  have  never  experienced  a  category  5  storm.  

The  engineers  are  not  sure  the  levees  will  be  able  to  withstand  the  force  of  the  storm.    

Develop  a  solu&on  to  protect  the  two  mile  span  of  land  that  is  inhabited  by  1,000  residents.  

Pairs  

Discuss  your  thoughts  on  possible  solu%ons.  

Fours  

Come  to  a  consensus  on  the  best  proposed  solu%on.  

Eights  

Agree  on  the  best  solu%on.  

Whole  Class  Discussion  

Discuss  and  support  each  solu%on  to  reach  a  whole  group  consensus.  

Exit  Ticket  

On  the  index  card  provided,  please  list:    

•  1  PRO  that  you  have  about  this  discussion  technique.  

•  1  CON  that  you  have  about  this  discussion  technique.  

•  1  ques%on  or  applica%on  that  you  have  for  this  discussion  technique.  

References  Snowball  Discussion  Technique  hMp://www.talkscience.org.uk/techniques/  

Picture  1-­‐  The  Levees  are  Breached  hMp://www.hurricanekatrina.com/  

Picture  2-­‐  Levees  in  New  Orleans  hMp://www.commondreams.org/headlines06/  0112-­‐15.htm  


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