The problem-solving geography ability needs to be developed by each student and can be developed by implementing the PBL model because it has been able to train problem-solving geography ability through actual problem steps. The purpose of this study is to know the significant impact of the PBL model use of the Edmodo (PBL_Ed) on solving the geography skills of senior high school students. The research design used was a quasi-experiment with a posttest-only control group design. The study subjects were the students of XI IPS SMA Laboratorium UM, the academic year 2020/2021. The assessment instrument uses an essay test arranged on an indicator of problem-solving skills, consisting of 1) identifying the problem; 2) defining the problem; 3) seeking alternative solutions; 4) determining the correct solution; and 5) concluding upon what has been obtained. The data analysis in this study uses an independent sample t-test model with a 0,05 sig level. The results of the t-test analysis showed the probability value at 0,003 ≤ 0,05. The results showed a significant influence of the PBL model with the Edmodo (PBL_Ed) on problem-solving geography skills of senior high school students. An experiment class using a PBL model with the Edmodo (PBL_Ed) has problem-solving geography skills higher than the control class using conventional models. Kemampuan pemecahan masalah geografi perlu dimiliki oleh setiap siswa dan dapat dikembangkan dengan mengimplementasikan model PBL karena mampu melatih kemampuan pemecahan masalah geografi melalui langkah-langkah model PBL berdasarkan permasalahan nyata. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh yang signifikan model PBL berbantuan Edmodo (PBL_Ed) terhadap kemampuan pemecahan masalah geografi siswa SMA. Rancangan penelitian menggunakan quasi eksperiment dengan desain posttest only control group. Subjek penelitian adalah siswa kelas XI IPS SMA Laboratorium UM semester genap tahun ajaran 2020/2021. Instrumen penilaian menggunakan tes essay disusun berdasarkan indikator kemampuan pemecahan masalah, terdiri atas 1) mengidentifikasi masalah; 2) mendefinisikan masalah; 3) mencari solusi alternatif; 4) menentukan solusi yang tepat; dan 5) menyimpulkan atas apa yang telah diperoleh. Analisis data dalam penelitian ini menggunakan model uji independent sample t-test dengan taraf sig 0,05. Hasil analisis uji t menunjukkan nilai probabilitas (sig. 2-tailed) sebesar 0,003 0,05. Hasil penelitian menunjukkan bahwa terdapat pengaruh yang signifikan model PBL berbantuan edmodo (PBL_Ed) terhadap kemampuan pemecahan masalah geografi siswa SMA. Kelas eksperimen menggunakan model PBL berbantuan edmodo (PBL_Ed) memiliki kemampuan pemecahan masalah geografi lebih tinggi daripada kelas kontrol yang menggunakan model konvensional.
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