Group Investigation Technique on Indonesian High School Students’ Writing Skill

Writing is the work of pouring ideas, expressing those ideas, and organizing them into statements and
paragraphs that will be clear to a reader. Five points that students need to pay attention to in writing are
content, organization, vocabulary, language use (grammar) and mechanic. Therefore, in this research, the
researcher chooses Group Investigation Technique in teaching writing skill. The objective of this research
is to discover whether any significant effect or not in the implementation of Group Investigation Technique
on Indonesian high school students’ writing skill because the students were not familiar with the written
form in English in spite of, they have some assignments about that. Some students were not confident to
write in English because they were afraid to make mistake in grammar. The researcher used Quantitative
approach and Quasi Experiment method with Non–Equivalent Control Group Design. Both of experimental
class and controlled class consist of 38 students as the sample of this research. The result of this research
is shown the mean score of controlled class (X.FI.1) pretest (58,5) is a little smaller than experimental class
(X.FKK.2) pretest (60,26). Meanwhile the mean score of controlled class posttest (65,82) is way smaller
than experimental class posttest (73,4). Based on the data analysis posttest of hypotheses testing with
significantlevel 5%(0,05),theresult obtained that tcount(3,18) > ttable (1,99) where the statistical hypotheses
of H0 was rejected and H1 was accepted. So, it can be concluded that there is significant effect in the
implementation of Group Investigation Technique on Indonesian High School Students’ Writing Skill.