The previous theories proposed by some experts show that needs analysis become a crucial thing in developing ESP materials. The developed materials
should present students’ needs and interests in order to deliver the materials effectively.
3. Content – Based Instructions
a. Definition of Content – Based Instruction
Content-based  instruction  is  used  in  a  variety  of  language  learning context. CBI has been applied for the teaching and learning process of second
language  students  as  well  as  foreign  language  students.  This  approach  is appropriate for English for Academic Purposes program.
Krahnke 1987:65 cited in Richards 2006 defines CBI as “the teaching
of content or information in the language being learned with little or no direct explicit  effort  to  teaching  the  language  itself  separately  from  the  content
being taught”.  In this case, content means the information or subject matter that  learners;  learn  or  communicate  through  language.  In  line  with  this
statement, Richards 2006 claims that content-based instruction can be used as  the  framework  of  a  unit,  as  the  guiding  principle  for  course,  as  a  course
that helps students in mainstreaming, and as the basic thought for the use of English as a medium for teaching some school subjects in  an English foreign
language setting.
Further  Richards  2006:28  states  some  of  assumptions  about  language learning in content-based instruction as mentioned below.
1. People learn a language more successfully when they use the language
as a means of acquiring information, rather than as an end in itself. 2.
CBI better reflects learners’ needs for learning a second language. 3.
Content  provides  a  coherent  framework  that  can  be  used  to  link  and develop all of the language skills.
Furthermore, Crandall and Tucker 1990: 187 define CBI as an approach to language instruction that integrates the presentation of topics or tasks from
subject  matter  classes  e.g.,  math,  social  studies  within  the  context  of teaching a second or foreign language.
In line with some theories above, this research aims to develop the English reading  learning  materials  by  applying  content
–  based  instruction.  This approach is appropriate for students of International Mathematics Education.
This research aims to present English reading skills within the context. In this case,  the  students  will  be  provided  the  English  texts  related  to  mathematics
study.  By  applying  this  approach,  it  is  expected  that  the  students  will  be having  a  meaningful  learning  since  the  CBI  tends  to  combine  the  language
skill with the context or circumstances of students. b.
Principles of Content – Based Instruction
Richards  2006:207  proposes  the  principles  of  content-based  instruction as mentioned below.
1. People learn a second language more successfully when they use the
language as a means of acquiring information, rather than as an end in itself.
2. Content-Based Instruction better reflects learners’ needs for learning a
second language.
The  first  principle  shows  that  the  movement  of  content-based  instruction  is that this approach is more effective in doing language learning. Furthermore,
the  second  principle  reflects  that  content-based  instruction  prepares  ESL students for academic studies. It means that this approach needs to be able to
access the content of academic learning and teaching. Furthermore,  Brinton  2003  in  Nunan  2003:  205-209  proposes  six
principles of CBI as mentioned below: 1.
The  instructional  decision  is  based  on  content  rather  than  language criteria.
2. CBI integrates the four skills as well as grammar and vocabulary.
3. CBI involves  students actively in all phases of the learning process that
students  learn  thorough  doing  and  are  actively  engaged  in  the  learning process  and  do  not  depend  on  the  teacher  to  direct  all learning  to  be  the
source of all information. 4.
CBI  chooses  content  for  its  relevance  to  students’  life, interests  and  or academic goals.
5. Since the key component of CBI is authenticity, the tasks associated with
a given text should mirror those that would take place in the real world. 6.
CBI  makes  use  of  awareness  raising  tasks  to  draw  attention  to  specific language features found in the authentic texts.
c. Teaching and Learning Activities
There  are  some  types  of  activities  in  content-based  instruction.  Stoller 1997  cited  in  Richards  2006:  212-213  classified  the  activities  of  CBI
based on their instructional focus like mentioned below. 1.
Language skill improvement 2.
Vocabulary building 3.
Discourse organization 4.
Communicative interaction 5.
Study skills 6.
Synthesis of content materials and grammar In  addition,  Mohan  1986  sited  in  Richards  2006  also  defines  that
content-based instruction is built around the notion of knowledge structures. It  means  that  the  knowledge  structure  over  the  frameworks  and  schemas  of
curriculum.  Further  he  divided  the  framework  into  six  universal  knowledge structures  such  as  practical  elements  and  theoretical  element.  The  practical
elements represent the specific of knowledge structures including description, sequence,  and  choice.  Meanwhile  the  theoretical  knowledge  represents  the
general of knowledge structures including concepts classification, principles, and evaluation.
d. Roles of Materials
It is known that the materials play the important  role in the development of  content-based  instruction.  Stryker  and  Leaver  1997  propose  two
characteristics of CBI materials as follows: 1
The provided materials must be authentic. It means that the materials must be like the ones used in native language instructions.