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With α =0, 05 with df =78, the critical value of t is 1.992. Therefore, the Ho
accepted area was the value between -1.992 and 1.992. The obtained t value from t-test was 28.145 and it was located in Ha refused area. Because t was located in
refused area Ha, so it could be concluded there was significant of final condition between experimental group and control group. This was the experimental group
was better than control group.
4.4 Discussion of the Research Findings
The objective of this research was to know if there was an effective of using think-pair-share strategy in teaching reading descriptive text mastery by the grader
seventh of SMP N 1 Gabus, Purwodadi in academic year 20092010. In the pre test, the average score of the experimental group was 62.82 and
post test was 76.15. Meanwhile the pre test of control group was 60.77 and post test 68.21. Although it showed a slight difference between the two means, the
result showed that the post test was better than pre test. To check the significant effect of the treatment, the writer analyzed by using
t-test formula. The result of post test between experimental group and control group are:
in α =5 with df = 78 so, t
0.9578
39 + 39 – 2 = 1.992
With α =0, 05 with df =78, the critical value of t is 1.992. Therefore, the Ho
accepted area was the value between -1.992 and 1.992. The obtained t value from
Accepted area Ho
Refused area Ha
Ho
Refused area Ha
-1,992 1,992 28.145
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t-test is 28.145 and it was located in the Ha refused area. Because t was located in refused area Ha, so it could be concluded there was significant of final
condition between experimental group and control group. This was the experimental group was better than control group.
4.5 Grades of the Achievement
The writer was to find out whether think-pair-share strategy was effective to teach reading descriptive text for the grade seventh students of Junior High School.
Below was the list of the level of mastery that shows the percentage of the correct answers and grade for the experimental group and control group.
Percentage of correct answer
grade Level of achievement
93-100 A-outstanding Outstanding
achievement 85-92
B-very good Above average
achievement 75-84 C-satisfactory
Average achievement
60-74 D-very weak
Below average achievement
Below 60 E-fail
Insufficient achievement
Tinambunan 1988: 129 From the table above, Tinambunan stated if percentage of correct answer
from an evaluation 93-100, the grade was A Outstanding, the level of achievement was outstanding achievement. If percentage of correct answer from
an evaluation 85-92, the grade was B very good, the level of achievement was
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above average achievement. Then percentage of correct answer from an evaluation 75-84, the grade was C satisfactory, the level of achievement was
average achievement. Then percentage of correct answer from an evaluation 60- 74 , the grade was D very weak, the level of achievement was below average
achievement. Then percentage of correct answer from an evaluation below 60, the grade was E fail, the level of achievement was insufficient achievement.
1. The Experimental Group
No Number of
students Percentage of
correct answer grade Level
achievement
1 10 93-100
A-outstanding Outstanding
achievement 2.
10 85-92
B-very good Above average
achievement 3. 13
75-84 C-satisfactory
Average achievement
4. 6
60-74 D-very weak
Below average achievement
5. Below
60 E-fail
Insufficient achievement
The writer used Tinambunan’s statement and got the result of post test from experimental group, they were: 10 students got percentage an evaluation 93-
100, the grade was A Outstanding, and the level of achievement was outstanding achievement. 10 students got percentage of correct answer from an
evaluation 85-92, the grade was B very good, and the level of achievement was above average achievement. 13 students got percentage of correct answer
from an evaluation 75-84, the grade was C satisfactory, and the level of achievement was average achievement. 6 students got percentage of correct
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answer from an evaluation 60-74 , the grade was D very weak, and the level of achievement was below average achievement.
2. The Control Group No Number
of students
Percentage of correct answer
grade Level achievement
1 3 93-100
A-outstanding Outstanding
achievement 2.
8 85-92
B-very good Above average
achievement 3. 12
75-84 C-satisfactory
Average achievement
4. 11
60-74 D-very weak
Below average achievement
5. 5 Below
60 E-fail
Insufficient achievement
The writer used Tinambunan’s statement and got the result of post test from control group, they were: 3 students got percentage an evaluation 93-100, the
grade was A Outstanding, and the level of achievement was outstanding achievement. 8 students got percentage of correct answer from an evaluation 85-
92, the grade was B very good, and the level of achievement was above average achievement. 12 students got percentage of correct answer from an
evaluation 75-84, the grade was C satisfactory, and the level of achievement was average achievement. 11 students got percentage of correct answer from an
evaluation 60-74 , the grade was D very weak, and the level of achievement was below average achievement. 5 students got percentage of correct answer from
an evaluation below 60, the grade was E fail and the level of achievement was insufficient achievement.
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From the significance above, it could be concluded that the grade of achievement of experimental group was better than control group.
4.6 Analysis of the Experimental Group
