According to Liu and Hansen in Kitchakarn 2009, peer response is  the  way  of  interaction  between  students  to  share  or  exchange
information  with  each  other.  Peer  response  plays  an  important  role  in writing. Peer’s comments can lead to the meaningful source of information
in the revising  stage.  Peer’s  comments  from  revision  can  be  used  to
develop vocabulary, organization and content of writing. Writing teachers used the peer response to encourage students to revise their writings.
The    definitions  above    show    that  peer    responses    is  a  way  of collaborative  learning    in    which    students    respond    to    one    another’s
work  of  writing. The responses  can  be  a  comment  to  help  another students  get a  better development in writing process.
b. Importance of Peer Response
Peer response, in Indonesia, is one of the new methods in teaching- learning English  in which  is  still  rarely  to  apply. Yet,  it  is  actually
important to improve  students’  capability  in  English,  more  in  writing
because it gives many benefits. James 1981: 48-50 and Grimm 1986: 91-94  as quoted by Reid
1993:207  state  that    one  of  the    greatest  benefits of  peer   response groups    is    the  immediate    presence    of    the    real-world    readers.
Researcher    of    both    NES    and    ESL  writing    have    demonstrated    that, with  carefully   designed  and  implemented   peer response    groups,   the
concept  of  audience  provided  by  peer  response  allows writers to think
not just about readers as readers but also to actually read the text through the    eyes    of    potential    readers,    trying    to    judge    the    meaning    these
readers would  make.  As a result, students begin to adopt the perspectives of their audiences and to comprehend their text.
Moreover, Lui and Hansenin in Kitchakarn 2009:74 supported the peer review for several reasons. First, the students have another reader for
their  written  work,  not  only  the  teacher.    Secondly,  when  students  make errors  they  do  not  detect  in  their  own work,  they  can avoid  penalty.
Thirdly,  while  evaluating  othe r  students’  papers,  they  can  improve  their
ability to judge their own writing. Kitchakarn  2009:75 also states  that  in the  revising  stage  of
the writing  process,  it requires  various  types  of  activities  responding to    students’  written  work including  peer  feedback  or  peer  response.
Feedback from the readers plays an important role for improving writing. Any suggestions  got  from the  readers  can  reflect  on
the  writers’ performance, leading to writing improvement.
Ferris  2003:70  adds  that  from  these  theoretical  perspectives,  a number  of  practical  benefits  of  peer  response  for  L2  writers  have  been
suggested by various authors: 1 Students gain confidence, perspective,  and critical thinking skills from
being able to read texts by peers writing on similar tasks. 2 Students  get  more  feedback  on  their  writing  than  they  could  from  the
teacher alone.
3 Students get  feedback from a more diverse  audience bringing multiple perspectives.
4 Students  receive  feedback  from  non-expert  readers  on  ways  in  which their texts are unclear as to ideas and language.
5 Peer review activities build a sense of classroom community In  addition,  the  researcher  concluded that the peer  response  is  a
student-centered,  active  learning  strategy  that  increases  student engagement in the course. More benefits of peer response are listed below.
1 Student authors: a Refine their ideas as a result of the feedback they receive.
b Focus on writing as a process that emphasizes editing and revisions. c Develop a better sense of audience.
d Improve their work before it’s submitted for grading.
e Are  motivated  to  produce  high-quality  work,  since  they  know  their peers will be critiquing it.
2 Student reviewers: a Gain insights about their own work from reading other assignments.
b See other approaches to an assignment or perspectives of an issue. c Become  familiar  with  important  aspects  of  the  assignment  as  they
use the rubric or criteria to perform the review. d Improve their ability to read a paper critically.
e Strengthen  their  communication  skills,  especially  in  respect  to critiquing and providing feedback.
f Gain knowledge of a wider variety of course topics. In brief, peer response technique gives many benefits for teaching-
learning of writing. Beside to make the students think as the real writers, it also  makes  the students  think  as  the  potential readers. The  students  can
measure their capability in writing and describe the mental processes when they write.
c. The Implementation of the Peer Response in Teaching Writing