Development of Textbooks Textbooks
                                                                                12 Materials should take into account that learners differ in affective attitudes
13 Materials should permit a silent period at the beginning of instruction
14 Materials  should  maximize  learning  potential  by  encouraging  intellectual,
aesthetic, and emotional involvement that stimulates both right and left  brain activities
15 Materials should not rely too much on controlled practice
16 Materials should provide opportunities for outcome feedback.
The  impact  of  the  use  of  textbooks  as  one  of  instructional  materials  to classroom  learning  is  significant,  and  they  have  been  shown  to  be  a  significant
tool  for  teachers  in  classrooms.  Textbooks  as  an  instructional  material  serves  as one  of  the  most  important  means  of  access  for  students  to  the  knowledge  and
skills  they  must  master.  Textbooks  also  support  teachers  in  making  instructional decisions and selecting effective teaching strategies that lead to student mastery of
the language. Richards and Renandya 2002 summarize several roles and characteristics
of effective language teaching materials: 1 Language is functional and must be contextualized,  2  Language  development  requires  learner  engagement  in
purposeful  use  of  language,  3  The  language  used  should  be  realistic  and authentic,  4  Classroom  materials  will  usually  seek  to  include  an  audiovisual
component, 5 Learners need to develop the ability to deal with written as well as spoken  genres,  6  Effective  teaching  materials  foster  learner  autonomy,  7
Materials  need  to  be  flexible  enough  to  carter  to  individual  and  contextual
differences,  and  8  Learning  needs  to  engage  learners  both  affectively  and cognitively.
                