THE EFFECTIVENESS OF ENGLISH FOR SPECIFIC PURPOSES (ESP) VOCABULARY TEACHING TO ENHANCE VOCABULARY MASTERY: A STUDY OF ELEVENTH - GRADE STUDENTS AT MA NURUL IMAN MONTONG BAIK
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Rendahnya penguasaan kosakata bahasa Inggris pada siswa sekolah kejuruan/madrasah seringkali disebabkan oleh ketidakrelevanan materi General English dengan kebutuhan akademik siswa. Penelitian ini bertujuan untuk mengukur efektivitas penerapan pendekatan English for Specific Purposes (ESP) dalam meningkatkan penguasaan kosakata siswa Kelas XI jurusan Bisnis di MA Nurul Iman Montong Baik. Penelitian ini menggunakan metode kuantitatif dengan desain Pre-Experimental (One-Group Pretest-Posttest Design). Subjek penelitian dipilih menggunakan teknik sampling jenuh, yang terdiri dari 26 siswa Kelas XI. Instrumen penelitian berupa tes kosakata yang telah divalidasi ahli, dan data dianalisis menggunakan Paired Sample T-Test serta Normalized Gain (N-Gain) dengan bantuan SPSS 27. Hasil analisis menunjukkan adanya peningkatan skor rata-rata yang signifikan dari 45.00 pada pre-test menjadi 75.38 pada post-test. Uji hipotesis menunjukkan nilai signifikansi ( ) sebesar 0.000 ( ), yang berarti hipotesis alternatif diterima. Selain itu, perhitungan N-Gain menghasilkan skor rata-rata 0.56 yang masuk dalam kategori efektivitas “Sedang”. Penelitian ini menyimpulkan bahwa pengajaran kosakata berbasis ESP efektif dalam meningkatkan kompetensi siswa karena materi yang disajikan relevan dengan jurusan mereka, sehingga mempermudah proses retensi memori dan motivasi belajar.
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