1. Consist of 45 students 2. The classroom is large enough.
3. The students come from the middle-lower social life 4. Almost of the students parents are seller or vendor
5. The students have no high motivation in learning, etc The writer decided to take two classes of eight grade of MTs Al- Ishlah
Cikarang utara-Kab.Bekasi that is 8-a and 8-b which consist of 45 students for each classes, and the writer took 20 students from each class by random sampling,
8- a student’s taught teaching vocabulary adjective by using cooperative learning
called Experiment class and 8-b students taught without cooperative learning called Controlled Class.
4. The Instrument of Research
The instrument of the research used by the writer in collecting data is taken from the application test of vocabulary adjective. The writer gave the test to eight
grade students of MTs Al- Ishlah, which was decided into two categories, the first students is taught by using cooperative learning method and second students is
taught without using cooperative learning method. Pre-test and post test are the test given in this research. Pre-test is the test
given to the students before the test vocabulary of adjectives by using Cooperative Learning method.
The post-test is given to the students after the students had got the treatment or the teaching process through Cooperative Learning method. Post-test
is the test given to the students for checking the progress after teaching vocabulary of adjective by using Cooperative Learning. The test of post-test is the same as the
test of pre-test in the form of instruments test. The test consisted 45 items. See appendix
5. The Technique of Collecting Data
Collecting data is an important thing in this research that can be determined. The writer did the following techniques as method in ollecting data:
1. Experiment The teacher taught vocabulary of adjective by using Cooperative Learning
method at the eighth grade of MTs. Al-Ishlah Cikarang. The teaching process was conducted in eight meetings and was systematically arranged in a lesson
plan. 2. Test Pre-test and Post-test
The writer used test as data collection. The writer gives a pre-test to the students before beginning the lesson and pos-test at the end of the lesson. The
test was given in two kinds: pre-test and post- test in the form of instruments test. The writer used pre-test and post-test to collect the data:
1. Pre-test The pre-test was given in the beginning of the class the pre-test was given
before the writer doing the experiment to know the student knowledge of the material that will be taught. It explains with the following direction:
a Multiple choice items with vocabulary of adjective. It consisted of 30 questions.
b Match the pictures with the list of skill on vocabulary adjective the left side. It consisted of 10 questions.
c Fill in the blank with vocabulary of adjective. It consisted of 5 questions.
2. Post-test The writer gave the post-test after the lesson finished to know the students
ability in mastering the materials taught. It follwed the following steps: a Multiple choices item with vocabulary of adjective. It consisted of
30 questions. b Match the pictures with the list of skill on vocabulary adjective the
left side. It consisted of 10 questions. c Fill in the blank with vocabulary of adjective. It consisted of 5
questions.
