2.  We  evaluate  existing  materials  with  a  view  to  choosing  suitable materials for language programs.
3.  We  evaluate  the  materials  that  we  have  already  chosen  or  that  have been chosen for us so that we can adapt the materials in order to make
them better suit the needs of the students and the needs of teaching. 4.  We  also  evaluate  the  materials  produced  by  ourselves  so  that
necessary revision can be made.
e. Principles in Materials Evaluation
There are two principles in materials evaluation: effectiveness and efficiency Ellis 1998 in Tomlinson 1998.
Effectiveness principle: Is a course book effective in meeting the
needs  of  the  learners?  To  answer  this  question,  the  evaluator  needs  to compare what the learners knew and were able to do before they used the
course book with what they know and are able to do after they have used the book;
Efficiency  principle: Does  a  course  book  meet  the  needs  of  the
learners  more  effectively  than  some  alternative  course  books?  To investigate  efficiency,  it  is  necessary  to  compare  the  learning  gains
evidenced by using one course book with the gains evidenced by another course book.
B. Review of Related Studies
This research is about developing listening – speaking materials based on
Total  Physical  Response  theory  for  Primary  School  students.  Based  on researcher’s  knowledge,  there  are  some  previous  studies  related  to  the
development  of  listening – speaking materials  for children and the use of Total
Physical Response to teach English for young learners. Indah  2012  conducted  a  research  on  the  development  of  speaking  kits
using  TPR  approach  for  the  fifth  grade  students  of  Mejing  Elementary  Schools. She  stated  that  TPR  was  relevant  approach  for  developing  speaking  kits.  After
implementing the speaking kits, the students had great progress in speaking. Nuryani  2013  investigated  the  implementation  of  TPR  method  in
learning  listening.  She  suggested  that  TPR  was  an  appropriate  method  for teaching listening skill  of English.  Based on her  research, TPR could  reduce the
pressure  for  the  students  and  increase  the  students’  confidence  and  in  the  same time provide the students with long-term retention of language items.
Another  study  was  done  by  Astuti  2010  who  implemented  TPR  in developing  listening  tasks  for  the  third  grade  students  in  Margosari  Elementary
School.  She  stated  that  TPR  was  relevant  with  listening  tasks  and  the  students understood the tasks easier.