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Observational sheet that used to get the data during the observational in the class. It is used to monitor and record the data of the teachers’ and students’
performance during the teaching and learning process. The information obtained from the observation is used as a basis to determine the planning for the following
cycle. 2.
Interview Guideline Besides observation sheet, interview guideline used to complete the data
needed. The interview was conducted to the English teacher and students of SMP Al-Kautsar BKUI Jakarta. It was applied before and after Classroom Action
Research. 3.
Test Pre-action test and post-test conducted before and after the
implementation of visual scaffolding technique in teaching vocabulary. The aim of giving the test is to measure students’ vocabulary mastery.
H. The Technique of Data Collection
There were three techniques of collecting data applied in this study; they are observation, test, and interview. In this research used qualitative data and
quantitative data. The qualitative data consists of observation within the physical activity in the classroom and interview to be presented for the teacher and
students. On the other side, the quantitative data used is pre-test and post-test.
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The completely explanation as follows:
1. Observation
Observation technique is the main technique in collecting the data about the teacher’s performance, condition of class, students’ response concerning the
use Clustering Technique. It deals with the activities of the English teacher in presenting English materials to the students. The observation conducted to
observe teaching-learning vocabulary in the real classroom activities at second grade students of SMP Al-Kautsar BKUI Jakarta in 20132014 academic years. It
5
Suharsimi Arikunto, Penelitian Tindakan Kelas, Jakarta: Bumi Aksara, 2009, p. 127 —
132.
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used to know about the implementation of Clustering technique. Thus, in vocabulary material, the writer observed their vocabulary aspect, such as: words
meaning, spelling, pronunciation, level of usage.
2. Interview
One of the ways to get deep information in the classroom is by interviewing the English teacher and the students. The unstructured and structured
interview is conducted by the writer for this research. The structured interview conducted by using interview guide and it was conducted before and after
implementing the classroom action research. The interview was about the English teaching learning process at SMP Al-Kautsar BKUI Jakarta. Primarily, about
English teaching learning process, especially in vocabulary mastery.
3. Test
The test was used to find out the result of students’ achievement in
learning vocabulary by using Clustering technique and it is as main Technique in collecting the data. The test was
used to compare students’ English vocabulary mastery before conducting the research and after conducting the research.
I. The Technique of Data Analysis
The writer took the average of students’ vocabulary score to analysis the quantitative data in one cycle. It is used to measure how well students’ ability on
vocabulary. It uses the formula as below:
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X : mean x : individual score
n : number of students
6
Anas Sudijono, Pengantar Statistik Pendidikan, Jakarta, Raja Grafindo Persada, 2008, p. 80.
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Next, the writer tried to get the class percentage which pass the minimal mastery level criterion KKM considering English subject gains score 70
seventy. The formula is:
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P : the class percentage f : total percentage score
N : number of students After getting mean of s
tudents’ score per actions, the writer analyzed whether there are any improvement of students’ vocabulary score from pre-test up
to students’ average score in cycle 1 and cycle 2 or not. In analyzing that, the
writer used the formula:
P : percentage of students’ improvement
y : pre-test result y1 : post-test 1
P : percentage of students’ improvement
y : pre-test result y2 : post-test 2
7
Ibid., p. 43.
