Penerapan Model Pembelajaran Numbered Heads Together berbantuan Media Baamboozle untuk Meningkatkan Hasil Belajar Siswa

Abstract

Penelitian ini bertujuan untuk mengetahui peningkatan hasil belajar siswa setelah penerapan model pembelajaran Numbered Heads Together (NHT) berbantuan media Baamboozle pada materi gelombang. Penelitian menggunakan pendekatan kuantitatif dengan metode pre-eksperimen dan desain One-Group Pretest-Posttest Design. Sampel penelitian terdiri atas 23 siswa kelas VIII salah satu MTs di Kabupaten Tasikmalaya yang dipilih menggunakan teknik purposive sampling. Data dikumpulkan melalui instrumen pretest-posttest, angket tanggapan siswa, dan lembar observasi keterlaksanaan pembelajaran. Analisis data meliputi N-Gain, uji Wilcoxon, dan effect size. Rata-rata nilai pretest sebesar 30,43 meningkat menjadi 69,56 pada posttest. Uji Wilcoxon menunjukkan adanya perbedaan yang signifikan antara skor pretest dan posttest (Z = -4,276; p < 0,001), dengan effect size sebesar 0,89 yang termasuk kategori besar. Nilai N-Gain perlu dilaporkan berdasarkan prosedur perhitungan yang digunakan. Tanggapan siswa terhadap pembelajaran memperoleh persentase 89,13% dengan kategori sangat baik. Hasil penelitian menunjukkan adanya peningkatan hasil belajar setelah penerapan NHT berbantuan Baamboozle. Karena penelitian menggunakan satu kelompok tanpa kelompok kontrol, temuan ini merupakan bukti awal dan belum dapat digunakan untuk menyimpulkan hubungan kausal.

This study aimed to examine improvements in students' learning outcomes after implementing the Numbered Heads Together (NHT) learning model assisted by Baamboozle media on the topic of waves. The study employed a quantitative approach using a pre-experimental method with a One-Group Pretest-Posttest Design. The research sample consisted of 23 eighth-grade students from an Islamic junior high school (MTs) in Tasikmalaya Regency, selected through purposive sampling. Data were collected using pretest-posttest instruments, student response questionnaires, and learning implementation observation sheets. Data analysis included N-gain calculation, normality testing, hypothesis testing, and effect size analysis. The results showed that the average pretest score of 30.43 increased to 69.56 in the posttest. The N-gain value was 0.60, which falls into the moderate category, indicating that implementing the NHT learning model supported by Baamboozle media was reasonably effective in improving students' learning outcomes. The hypothesis test revealed a significant improvement in learning outcomes after the treatment was administered. Furthermore, the effect size value of 0.89 was categorized as large, indicating that the Numbered Heads Together (NHT) learning model assisted by Baamboozle media had a strong effect on students' learning outcomes. In addition, students' responses to the learning process reached 89.13%, categorized as very good, indicating that the learning activities were perceived as interesting, enjoyable, and capable of enhancing students' motivation and participation. Therefore, the Numbered Heads Together (NHT) learning model assisted by Baamboozle media had a positive effect on students' learning outcomes in the topic of waves.