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Table 3.9 Categorization of criteria fulfilment
Percentage Categorization
80 - 100 Good
60 - 79 Fair
50 - 59 Sufficient
Below 50 Poor
When the textbook achieved fulfilment of the criteria above 80, the quality would be categorized as good. The quality would be considered as fair if the
textbook achieved 60-79 fulfilment. When the achievement was between 50-59, it would be classified into sufficient quality. The quality of the
textbook would be categorized as poor if the fulfilment was below 50.
E. Research Procedure
There were some steps done in conducting this research. Those steps were:
1. Preparing the study
The researcher and his partners chose Interlanguage textbook to be analyzed. Interlanguage textbook is one of BSE Buku Sekolah Elektronik which is
provided by Indonesian government. The researcher studied about the content of the textbook.
2. Analysing the textbook
The researcher selected the theory to be implemented in evaluating Interlanguage textbook. After that, he adapted the criteria of textbook evaluation
which is proposed by Cunningsworth 1995 and made the checklist as the instrument. By using the checklist, the researcher evaluated the textbook.
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3. Validating the result
The next step was validating the result. To validate the result of the evaluation, the researcher crosschecked it with the other research collaborators’ result. When
all researchers agreed, it was assumed that the result was established. This was done to make sure if the textbook were evaluated by the other research
collaborators, the result would not be too different.
4. Writing the report
The last step was writing the report. After validating the result, the researcher interpreted the data by calculating the result of the checklist. He used a formula to
calculate it and describe the data by using a table of condition provided. The result of the evaluation was written in discussion part and supported with proof taken
from the Interlanguage textbook.
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CHAPTER IV RESULTS AND DISCUSSION
This chapter covers the results and discussion. There are two sections in this chapter. First section is about textbook evaluation. Second section is about
strengths and weaknesses of Interlanguage: English for Senior High School Student X.
A. Textbook Evaluation
The textbook evaluated in this research was Interlanguage: English for Senior High School Student X. This textbook is written by Joko Priyana, Virga
Renitasari and Arnys Rahayu
Irjayanti. A checklist adapted from Cunningsworth’s textbook was used to evaluate this textbook. There were eight
aspects in this checklist; aims and approaches, design and organization, language content, skills, topic, methodology, teachers’ books, and practical considerations.
The overall evaluation summary of the textbook is showed in Table 4.1.
Table 4.1 Evaluation Summary Table
Evaluation Aspect Fulfilment
A. Aims and Approaches
66.67 B.
Design and Organization 57.14
C. Language Content
80 D.
Skills 66.67
E. Topic
100 F.
Methodology 80
G. Teachers’ Books
H. Practical Considerations
75 Average
65.69 Criteria
Fair
