The main objective of this study is to find out the implementation of cooperative learning think pair share type, the result of students achievement before and after using cooperative learning think pair share type and the effectiveness of cooperative learning think pair share type to improve students’ understanding on quantifier in the eight grade students of SMP N 23 Semarang.
The method of the research is experimental study. The data were obtained by giving test to the experimental class and control class after giving a different learning to both classes. The teacher gave three times teaching to both classes.
The number of the subjects was thirty in each class. They were VIII D is as experimental class (the students who were taught using think pair share), VIII E is as control class (the students who are not taught using think pair share).
The instruments used to collect the data were: observation and test. The observation was used to know the activities during teaching and learning process, such as how teacher explained the material, what is the students’ respond and how the students work in doing the test. Test was used to know students’ competence before and after the experiment was run. There were two kinds of test. They are pre-test and post test. Before items of the test were given to the students, the writer gave tryout test to analyze validity, reliability, difficulty level and the discriminating power of each item.
After the data were collected, the writer analyzed it. The first analysis data was from the beginning of control class and experimental class that was taken from the pre test value. It is the normality test and homogeneity test. It was used to know whether two groups had normal distribution and the same variant. Another analysis data is from the ending of control and experimental class. It is used to prove the truth of hypothesis that had been made.
The result of the research: The mean of grammar test score of the experimental were 77.667 and the mean of grammar test score of control class (the students who taught without using think pair share) are 68.000. Using think pair share is more effective than without using think pair share method in teaching quantifier. It is showed of the mean of experimental class is higher than control class (77,667 > 68,000). On the other hand, the test of hypothesis using t-test formula shows the value of the t-test is higher than the value of the t-table. The value of t-test is 3, 214, while the value of t-table on = 5% is 2,00 (3,755 >2,00). The hypothesis is accepted.
The result of this study is expected to be an information material for English teachers in teaching quantifier