rooted  in  psychological  and  mental  content  that  represent  a  complex  concept internally associated with their attitudes, expectations and personal experience.
Ther efore,  teachers‟  beliefs  investigated  in  this  research  deal  with  their
beliefs about the use of authentic materials to teach listening skill and the factors that affect their beliefs.
2. The Importance of Teachers’ Beliefs
Teachers  are  viewed  as  important  agents  of  change  in  the  reform  effort currently  under  way  in  education  and  thus  are  expected  to  play  a  key  role  in
changing schools and classroom. The importance of teacher beliefs within teacher education rests with the constructi
vist‟s conception of learning. Some researchers define the importance of
teachers‟ beliefs on their ways. Smylie 1988:23 in his path  analysis  study  of  56  teachers  undergoing  a  staff  development  process
concluded that teacher‟s perceptions and beliefs are the most significant predictors
of  individual  change.  Pajares  1992:  307-333  states  that  the  earlier  a  belief  is incorporated into the belief structure, the more difficult it is to alter.
In addition,  Thompson  1992:127-146 suggests that teachers beliefs and values  about  teaching  and  learning  affect  their  teaching  practices.  According  to
Horwitz  1985:  333,  addressing  the  beliefs  of  prospective  foreign  language teachers should be the first step in their development as foreign language teachers.
In other words, teachers‟ beliefs are the fundamental concepts to develop foreign language  teaching.  Williams  and  Burden  1997:  56
–57  propose  that  teacher beliefs  affect  everything  that  they  do  in  the  classroom,  influencing  classroom
strategies much more strongly than planned curriculum and pedagogies. perpustakaan.uns.ac.id
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Borg  S  2011 states  that  teachers‟  beliefs  strongly  shape  teachers  instructional
practices, and subsequently the learning opportunities that learners receive. In  his  review  of  16  studies  of  pre-service  teacher  beliefs,  Pajares  1992:
307-332  concludes that student teachers‟ beliefs play  a pivotal role in the way
they interpret and acquire information from their teacher education courses. Their beliefs act as perceptual, self validating, selective filters which sieve information
presented  to  them.  Richards  1998  says that teachers‟ belief systems, including
their attitudes, values, expectations, theories, and assumptions about teaching and learning, are considered a primary source of teachers‟ classroom practices. These
beliefs are usually guided by a number of factors: their own experience as learners in classrooms, prior teaching experience, classroom observations they are exposed
to, and their previous training courses at school. Pajares  1992:  307-332  summarizes  the  results  of  re
search  on  teachers‟ beliefs  by  indicating  that  there  was  a  strong  relationship  between  pedagogical
beliefs of teachers, their planning for teaching, teaching decisions and classroom practices. He added that the pedagogical beliefs of teachers before the service play
a central role in the explanation of knowledge and teaching behavior when joining the  teaching  profession.  In  his  opinion,  these  beliefs  are  the  strongest  factors
through which we can predict the teaching behavior. Ernest 1998 also says that teachers‟ beliefs have a strong effect on the teaching practices by converting those
beliefs into a practical reality. In addition, Clark  Peterson 1986 see that teacher
‟s  beliefs are a rich store  of  knowledge  that  might  affect  teaching  plans  and  thoughts.  Cronin-Jones
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1991:  235-250 also  find that there are four main categories of teachers‟ beliefs
that  strongly  affect  the  curriculum  implementation  process.  These  beliefs  are: beliefs on how students acquire knowledge, beliefs about the teacher‟s role in the
classroo m, beliefs related to the level of the student‟s ability in a particular age
group and beliefs about the relative importance of the content topics. To  sum  up,  teachers‟  beliefs  are  considered  as  fundamental  step  in
teaching EFL students in the explanation of knowledge, information and teaching behavior when joining the teaching profession.
3. Factors Influencing Teachers’ Beliefs