Abstract:
This study dealt with the implementation of group investigation strategy assisted
by digital story board media on the students’ critical thinking in writing. The
objective of the study was to find out the students’ improvement in critical
thinking by applying group investigation strategy assisted by digital story board
media. This study was conducted at SMA Al-Hikmah Medan in tenth grade
students academic year 2019/2020. The sample was taken by applying purposive
sampling technique. The number of subject in this research was 33 students. The
method of the research applied classroom action research. The instrument of the
reserach used observation sheet and essay test. The researcher conducted two
cycles in this research, there were two meetings in cycle I and two meetings in
cycle II. This research used quantitative and qualitative data. The quantitative data
showed that the mean in cycle I was 70.90, the mean score in cycle II was 83.33;
the students who got more than 75 in cylce I was 20 students and the percentage
was 60.6%, the students who got more than 75 was 26 students and the percentage
was 78.79%. The qualitative data got from observation sheet in every cycle
showed that the improvement of the teacher and the students’ behavior. Based on
the results from quantitative and qualitative data proved that group investigation
strategy assisted by digital story board media improved the students’ critical
thinking in writing.
