became the research participants. Meanwhile, out of 32 students of class XI Geologi Pertambangan B
GPB, there were 26 students who became the research participants. In addition to those participants, they were chosen because the
researcher should adjust his schedule to get the data and the teacher’s teaching schedule. As a result of the agreement of the schedule, the participants which were
chosen were XI Teknik Pemesinan A TPA and XI Geologi Pertambangan B GPB.
C. Research Instrument
The research instrument which was used in this research was human instrument. Since the main data, which were gathered, were the product of the
students’ ability to use basic clause patterns in a form of written compositions, the researcher played an important role as a human instrument whose job was to
analyse the documents in forms of students’ descriptive written compositions. The students’ compositions were regarded to be the main source of the
research. Through students’ compositions, the basic clause patterns and their distributions were able to be seen and analysed. Moreover, students’ compositions
were able to reflect their mastery over basic clause patterns as the compositions became more effective materials which showed students’ interest and knowledge.
Thornbury 1999: 73 claims that “student texts may be the most effective materials to know students’ knowledge, since they are likely to be of more interest
and remembered longer than those introduced by teachers or course books.”
D. Data Gathering Technique
Producing descriptive compositions became one of the items in the curriculum of the school for all grades in SMKN 2 Depok. Therefore, the data
were gathered through students’ production of the compositions. At the beginning of the teaching-learning activity, the teacher explained the materials related to the
topic of descriptive. In the following teaching-learning activity, the teacher gave a task to students which required them to make a descriptive composition. The
compositions should be submitted to the teacher in the end of the class. When the class was dismissed, the researcher met the teacher to acquire the compositions.
The task which was given to the students can be seen in Appendix B. The data gathering was conducted twice. The first data gathering was
conducted on October 13, 2009 in order to gain the data from class XI Teknik Pemesinan A
TPA. Meanwhile, the second data gathering was conducted on October 28, 2009 to gain the data from class XI Geologi Pertambangan B GPB.
E. Data Analysis Technique
