6 evaluation is needed. This research gives inspirations for other researchers to
conduct the similar researches for the sake of quality improvement of textbooks as well as education.
F. Definition of Terms
Key words used in this research are presented as follows
1. Content Analysis
Ary, Jacobs, and Sorensen 2010 state that content analysis focuses on analyzing and interpreting recorded material, such as textbooks, letters, films,
tapes, etc which begins with question from the researcher. In this research the recorded material which is evaluated is a textbook. The evaluation is conducted by
using a checklist.
2. Textbook
According to Tomlinson 2005, a textbook provides the core materials for a course. Another definition of textbook is stated by Richards, “Textbooks
may provide the basis for the content of the lessons, the balance of skills taught and the kinds of language practice the students take part in” 2001: 254.
Language textbooks cover grammar, vocabulary, pronunciation, functions, and the skills of reading, writing, listening, and speaking.
3. Interlanguage: English for Senior High School Students X Textbook
One of textbooks for language teaching is Interlanguage: English for Senior High School Students X. The writers of this book are Joko Priyana, Ph.D,
Arnys Rahayu Iryanti, and Virga Renitasari. Interlanguage: English for Senior
7 High School Students X is provided by Indonesian government. It is published in
2008 by Grasindo. Since it is provided by the government, this book is free to access by both teachers and students.
8
CHAPTER II REVIEW OF RELATED LITERATURE
This chapter explores two main parts. The first part is theoretical description. This part presents some quoted theories from experts related to the
research. The second part is the theoretical framework of the study. This part presents how the theories are used in this research.
A. Theoretical Description
In this part, the researcher discusses the theories used in this research. Those theories are about the role of textbook, textbook evaluation, textbook
evaluation criteria, genre-based approach, and teaching-learning cycle. The researcher reviews those theories from experts to support this research.
1. Definition of textbook
According to Tomlinson 2005, a textbook provides the core materials for a course. Language textbooks cover grammar, vocabulary, pronunciation,
functions, and the skills of reading, writing, listening, and speaking are included in a textbook for language teaching. There are several functions of textbooks in
language programs. Richards 2001: 254, mentions some functions of textbooks, a.
A reading textbook might be the basis for a course on reading skills, providing both a set of reading texts and exercises for skills practice.
b. A writing textbook might provide model compositions and a list of topics for
students to write about. c.
A grammar textbook might serve as a reference book and provide examples as well as exercises to develop grammatical knowledge.
d. A speaking textbook might provide passages for students to read and discuss.
e. A listening textbook together with audiocassettes or CDs might serve as the
primary listening input in a listening course.
