Abstrak.Tujuan penelitian ini yaitu mencari tipe content words yang paling meningkat setelah siswa diajar melalui teknik clustering dan untuk mengidentifikasi persepsi siswa terhadap pembelajaran kosakata melalui teknik clustering. Subjek penelitian ini adalah siswa kelas satu SMP Al-Kautsar Bandar Lampung. Class VIIE sebagai kelas penelitian dan kelas VII G sebagai kelas percobaan. Penelitian ini menerapkan T-test dan one way anova. Hasilnya menunjukkan bahwa penguasaan kosakata siswa meningkat secara signifikan dengan level signifikannya p0.05. Kata benda adalah tipe content word yang paling meningkat setelah siswa diajar melalui teknik clustering. Sebagai tambahan, peneliti menemukan beberapa efek positive pada persepsi siswa walaupun ada beberapa masalah yang dihadapi selama implementasi teknik cluster. Dapat disimpulkan bahwa teknik cluster memfasilitasi siswa dalam meningkatkan pencapaian kosakata. Abstract.This research aims to find out which types of content words improves the most after the students are taught through clustering technique and to identify the students’ perception towards teaching-learning vocabulary through clustering technique. The subject of the research was the first grade students of SMP Al-Kautsar Bandar Lampung. Class VII E was chosen as the experimental class and class VII G as the try out class. T-test and one way anova were applied in this research. The result indicates thatthe students’ mastery of vocabulary is improved significantly with the significant level 0.000.05. Noun was noted as a type of content words which improved the most after the students were taught through clustering technique. In addition, the researcher found some possitive effects on the students’ perception even though there were some problems faced during the implementation of clustering technique. This suggests that clustering technique facilitates the students to improve vocabulary achievement. Keywords: vocabulary, teaching vocabulary, clustering technique
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