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Lately,  cooperative  learning  strategies  recommended  by education experts to be used. Slavin in Hamruni 2012: 120 suggests
two reasons as follows: 1  Some  studies  showed  that  the  implementation  of  cooperative
learning can improve students’ learning achievement and social
relations in the same time. 2  Cooperative  learning  can  realize  the  need  for  students  to  learn,
solve problems, and integrate knowledge and skills. From these two reasons, the cooperative learning is a form of learning
that can improve the learning system.
b. Characteristics and Principles of Cooperative Learning
1 Characteristics of Cooperative Learning
Cooperative  learning  is  different  from  other  learning strategies. The difference can be seen from the learning process
is more emphasis on the process of cooperation. Hamruni 2012: 123  argues  about  the  characteristics  of  cooperative  learning,
including: a  Learning in teams
Cooperative learning is learning teams. Team is a place to reach the goal. Therefore, the team should be able to make
every student to learn. All group members should help each other  to  achieve  the  learning  objectives.  For  that,  learning
success criteria determined by the success of the team.
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Each  group  is  heterogeneous,  it  intended  that  each member of the group are able to provide the experience, give
and  take,  so  it  expected  to  get  contribution  from  every member for the success of the group.
b  Based on cooperative management As  a  function  of  management  in  general,  cooperative
learning  also  has  the  functions  of  planning,  organization, action,  and  control.  The  planning  function  indicates  that
cooperative learning need a mature plan so learning process can  be  effective.  Implementation  function  shows  that
cooperative learning should  be implemented in  accordance with  the  planning.  The  function  of  the  organization  shows
that  cooperative  learning  is  the  joint  work  among  the members of the group, because it necessary to regulate the
duties and responsibilities of each member of the group. The control  function  indicates  that  the  cooperative  learning
success  criteria  need  to  be  determined  through  tests  or nontest.
c  The willingness to cooperate Cooperative learning will succeed when the regularity of
the  duties  and  responsibilities  of  each,  so  we  need  to  help each other among its members.
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d  Skill to cooperate Skills  of  cooperation  applied  to  encourage  students  to
interact  and  communicate  with  other  members.  Students assisted in the completion of barriers for the success of the
group
2 Principles of Cooperative Learning
According to  Hamruni 2012:  125  four basic principles of cooperative learning are as follows:
a  Positive Interdependence The  success  of  group  depends  on  the  effort  to  solve  the
problem using effective performance on each member. So each group  member  will  feel  interdependent  with  the  division  of
tasks  that  have  been  appropriated  to  the  abilities  of  each member.
b  Individual Accountability The  success  of  the  group  depends  on  each  member  that
expected to make all members have responsibilities according to  their  duties,  while  the  teacher  has  a  role  to  provide  an
assessment of either individuals or groups. c  Face to Face Interaction
Cooperative  learning  provides  an  opportunity  for  each member to provide information and learn. Through face to face,
member  can  learn  from  the  experience  of  working  together,
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respecting differences, using the advantages and shortcomings of  each  member  for  filling  the  heterogeneous  elements  that
exist within the group. d  Participation and Communication
Cooperative  learning  is  educate  the  students  to  be  able  to participate actively and communicate that will be useful when
they  are  already  in  the  community.  Teachers  have  a  role  to provide good communication provision.  It is undeniable that
learn to communicate also requires time, so teachers need to educate them every time.
c. Procedure of Cooperative Learning