Abstract:
The study was aimed to find out the improvement of students’ achievement in
writing argumentative paragraph. This study applied classroom action research
design. It was done through planning, action, observation, and reflection. The
location of the research was SMA Perguruan Gajah Mada Medan Jl. H.M. Said
Medan. The subject of this research was the eleven grade students which consisted
of 25 students. Based on the writing argumentative paragraph score, students’ score
keep improving in every test. In the pre-test the mean score was 56.4%, in the first
cycle test the mean score was 71.4% and the second cycle the mean score was
94.52%. The improvement also can be seen from the percentage of the students’
writing argumentative paragraph, in pre-test 22.22% students’ got point more than
75. In the first cycle test 40% students’ got point more than 75, in the second
cycle test 100% students got point more than 75. It means that teaching writing
argumentative paragraph through jurisprudential inquiry method can improved the
students’ achievement in writing argumentative paragraph.
