C. Data Source
The data source of the research is the government-endorsed textbook entitled When English Rings A Bell for SMPMTs Kelas VIII contributed by Siti
Wachidah and Asep Gunawan and edited by Emi Emilia and Raden Safrina. It was published approximately in the middle of 2014 by Pusat Kurikulum dan
Perbukuan of the Balitbang of the Ministry of Education and Culture in Indonesia. This 232-page long textbook consists of twelve chapters and one
additional ‘singing a song’ chapter. In addition to the textbook which can be called the student book, it is also accompanied by a teacher book which contains
general guidance for teachers in using the textbook. This teacher book was also used as data source in the case of incomplete dialogs in the tasks section of the
student book as reference to the complete dialogs. Other than the possibility of the teacher revealing the dialogs to the students as examples of the correct dialogs, the
teacher book was also necessary as the research regarded the designers’ point of view in designing the model texts.
D. Data Collecting Technique
This research dealt with texts delineated by the data source of the textbook When English Rings A Bell for SMPMTs Kelas VIII. In order to record
only the relevant data, the researcher collected the data through the technique of collecting and examining Yin, 2011. In the collecting and examining technique,
the data are the contents of certain printed materials such as documents or archival records or more specifically written texts contained in the materials. The
researcher collected the determined sample of data by examining the texts and
then compiled it into the expected purposive sampling, in which also for this reason the technique of collecting always includes examining. In a more detailed
step by step procedure, this technique of data collecting employed by the researcher includes the following steps:
1. Skimming through the data source, 2. Determining the data collection technique which suits the research
best, 3. Deciding the most suitable sampling strategy for the research,
4. Defining the unitizing of the research including the sampling unit, recordingcoding unit, and context unit, with consideration to the
research objectives, 5. Recording the data, which consists of the activities of examining and
interpreting the data texts to identify the recording unit based on the literature review.
6. Designing the data sheets for the coding of the data and pre-testing the coding of the previously recorded data in the data sheets to
confirm that the collected data is well-saturated in categories. 7. Presenting all the recorded data in the data sheets to make them
available for analysis.
E. Instruments of the Research
There are two kinds of research instrument significant to this research. The first and primary research instrument is what Lincoln and Guba 2013 call
the human instrument, referring to the researcher as the instrument. In qualitative
Kategori