3.2. Research Area Determination Method
The research area was determined by using a purposive method. McMillan 1992:76 states that purposive method means selecting particular elements that
will be representative or informative about the topic. Based on the topic of the research, this research was conducted at SMP Negeri 11 Jember based on some
reasons as follows. 1 There was no previous researcher who conducted a research on the same
topic at the school. 2 The Headmaster and the English teacher gave permission to the researcher
to conduct this Classroom Action Research. 3 The seventh grade students of SMP Negeri 11 Jember in 20142015
academic year still had difficulties in learning English due to the lack of vocabulary knowledge, especially for class VII-A. It could be proved from
the information given from the English teacher interview see Appendix 3 and the English midterm test scores of all the seventh grade students in the
school from the English teachers see Appendix 2. 4 The English teacher had never applied English songs in teaching
vocabulary.
3.3. Research Subject Determination Method
The research subjects of this research were the students of class VII-A at SMP Negeri 11 Jember in the 20142015 academic year. McMillan 1992:68
states that a subject is an individual who participates in a research study. In this research, the researcher conducted a Classroom Action Research in class VII-A
and all the students in that class participated in the research. Besides, the researcher collected all the needed data from the students of class VII-A.
This class was chosen by using purposive method. Arikunto 2002:117 states that purposive method in selecting the research subjects is done by taking
the subjects that are not based on the strata, random or area, but it is based on their specific goals. The students of class VII-A were selected because of their
weaknesses in learning English, especially in vocabulary and its participation in
English class if it was compared with the other five classes. Both of the students’ active participation and their vocabulary achievement needed to be improved, so
the specific goals of this research were to improve the students’ vocabulary achievement and their active participation in class.
3.4. Operational Definitions of the Terms
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