Abstract:
This study deal with the effectiveness of Concept Sentence on students’ writing
skill at SMP Swasta Muhammadiyah 06 Medan. This research was conducted by
using qualitative method. In the case, the researcher took 39 students of SMP
Swasta Muhammadiyah 06 Medan as the sample. The instrument of this research
was made the text paragraph based on video about Narrative Text. The test was
take from handbook Erlangga grade VIII junior high school that was given as pre
test and post test. And the research used observation sheet of teacher performance
(LPKG) and questionnaire sheet of student response that contained of some
question. The result showed that the mean of pre test was 57,5 and the mean score
in post test was 76,8 achievement of student effectiveness activity, teacher
performance and students’ response was on good category. It means that there
was an effectiveness of Concept Sentence Technique in Students’ Writing skill
