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Dewi Syafriani, Dewi
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THE EFFECT OF PROBLEM-BASED LEARNING AND DISCOVERY LEARNING MODELS ON STUDENTS CHRITICAL THINKING SKILLS Nasution, Irma Yuliani; Syafriani, Dewi
JOURNAL OF SCIENCE AND SOCIAL RESEARCH Vol 8, No 3 (2025): August 2025
Publisher : Smart Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54314/jssr.v8i3.5538

Abstract

Abstract: This study aims to determine the effect of the Problem-Based Learning (PBL) model and the Discovery Learning (DL) model on students' critical thinking skills and to identify which aspects of critical thinking are most developed in the topic of reaction rates. The research employed a quasi-experimental design. The sample consisted of two experimental classes: class XI-1 as the first experimental group and class XI-4 as the second, each comprising 34 students. The research instrument was an essay test consisting of three questions. Hypothesis testing was conducted using an Independent Sample T-Test, which yielded a significance value of 0.001. Since the significance value is less than α (0.05), the alternative hypothesis (Ha) is accepted and the null hypothesis (Ho) is rejected, indicating a significant effect of the PBL and DL models on students' critical thinking skills in the topic of reaction rates. The analysis of critical thinking aspects shows that the ability to elementary clarifications was the most developed. This is evidenced by the n-gain percentage, which reached 94% for students taught using the PBL model and 86% for those taught using the DL model. Keywords: Problem-Based Learning, Discovery Learning, Critical Thinking Skills, Reaction Rate Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh model Problem Based Learning (PBL) model Discovery Learning (DL) terhadap kemampuan berpikir kritis siswa dan mengetahui aspek berpikir kritis yang paling terkembangkan pada materi laju reaksi. Jenis penelitian ini yaitu quasi experiment. Sampel penelitian terdiri dari XI-1sebagai kelas eksperimen I dan XI-4 sebagai kelas eksperimen II yang masing-masing berjumlah 34 siswa. Instrumen penelitian berupa tes esai sebanyak 3 soal . Uji hipotesis menggunakan uji Independent Sample T-Test dengan hasil penelitian diperoleh harga sig. 0,001. Nilai sig. < α (0,05) sehingga Ha diterima dan Ho ditolak yang artinya terdapat pengaruh yang signifikan kemampuan berpikir kritis siswa yang diberi pembelajaran menggunakan model PBL dan model DL pada materi laju reaksi. Hasil analisis aspek yang diperoleh indikator aspek memberikan penjelasan sederhana adalah aspek kemampuan berpikir kritis yang paling terkembangkan, terlihat dari persentase n-gain 94% untuk yang dijarkan menggunakan model PBL dan 86% untuk yang dijarkan menggunakan model DL. Kata kunci: Problem Based Learning, Discovery Learning, Kemampuan Berpikir Kritis, Laju Reaksi
Pengaruh Model Discovery Learning Berbasis Proyek Green Chemistry terhadap Hasil Belajar dan Keterampilan Kolaborasi Siswa Aulia, Sefhira; Syafriani, Dewi
Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Vol. 6 No. 2 (2026): April
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/panthera.v6i2.1254

Abstract

This study aims to analyze the effect of a green chemistry project-based discovery learning model on students' learning outcomes and collaboration skills in acid-base learning. This study used a quasi-experimental design with a pretest-posttest control group design in two randomly selected classes. The research instruments included a learning outcome test (pretest-posttest) and a collaboration skills observation sheet. Data were analyzed using the N-Gain test, independent sample t-test, and effect size calculation. The results showed that the N-Gain value of the experimental class was 0.66 ± 0.15, higher than the control class's 0.44 ± 0.14. Hypothesis testing showed a sig. <0.05 for learning outcomes and collaboration skills, indicating a significant difference between the two classes. In addition, the effect size values ​​obtained were 0.61 (moderate category) for learning outcomes and 0.96 (high category) for collaboration skills. These findings prove that the green chemistry project-based discovery learning model is effective in improving students' learning outcomes and collaboration skills, and have implications for the development of more contextual and collaborative chemistry learning.
Co-Authors Agustina, Husna Sari Alyanti, Davina Amdayani, Susilawati Ardila, Mutia Asyiah, Siti Atika, Fitthriyah Aulia, Sefhira Auliya, Nayla Milda Ayi Darmana, Ayi Bajoka Nainggolan Batubara, Nuraina Br Bangun, Devrinawati Butar Butar, Leli Andriani Dalimunthe, Makharany Damanik, Nova Dawolo, Berlinda Dwi Purnama Ginting, Elfrida Hany, Nadila Cempaka Ida Duma Riris Junifa Layla Sihombing, Junifa Layla Lubis, Destiyati Yulrima Marham Sitorus Mutiara Agustina Nst Nainggolan, Angel Natalia Marsaulina Nainggolan, Roma Agustina Uli Nasution, Irma Yuliani Nasution, Nita Nazelina Nasution, Zulfikri Munawir Ningsih, Asih Sukma Nst., Mutiara Agustina Panjaitan, Tiara Valentina Pardosi, Keken Tiur Puspita Sari, Dwy Putri Widyanti Ramadani, Dewi Suci Ratu Evina Dibyantini Rumahorbo, Nurli Yanti Sahputri, Ayumi Amalia Samosir, Rafidah Almira Sari, Dwy Puspita Sianturi, Yonaria Agustina Silalahi, Basaria Revalina Silitonga, Sriwindi Sinaga, Nazwa Atila Sipayung, Angela Inma Siregar, Nurhidayah Sutiani, Ani Syuhada, Feri Andi Tampubolon, Cindy Claudin Tarigan, Regina Sicilia Telaumbanua, Debi M N Ulviah, Nabilah Hidayatun Uthaamih, Putri Dhiyaa