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All Journal Prosiding Seminar Nasional Biologi Indonesian Journal of Science and Education
Nabila, Chelsea Eka Putrista
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Materials Science & Nanotechnology Physics

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Enhancing Students’ Critical Thinking Skills through Problem-Based Learning in Science Education Nabila, Chelsea Eka Putrista; Dea Santika Rahayu; Ahmad Muhlisin
Indonesian Journal of Science and Education Vol. 9 No. 1 (2025): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v9i1.3152

Abstract

Critical thinking skills are an essential aspect that students must possess in order to face the challenges of 21st century learning, especially in science learning, which is complex and requires in-depth analysis. Observations at SMP Negeri 1 Tempuran show that students' critical thinking skills are still relatively low. This condition is influenced by the implementation of a learning model that is not yet optimal and the dominance of the teacher's role in the learning process. An alternative solution that can be used is the Problem Based Learning (PBL) model, which places students at the center of learning by using contextual problems to trigger critical thinking. This study aims to determine the effectiveness of the PBL model in improving the critical thinking skills of junior high school students in science learning. The research method used a quantitative approach with a quasi-experimental design of the non-equivalent control group type. The sample consisted of class VII G as the experimental class and class VII F as the control class. The instrument was an essay test consisting of 10 questions that had been validated and tested for reliability. The data were tested for normality and homogeneity, then hypothesis testing was conducted using an independent sample t-test and N-Gain analysis. The results showed that the significance value was 0.011 < 0.05, and the N-Gain of the experimental class was 0.46 (moderate category), and that of the control class was 0.29 (low category). The conclusion of this study is that the PBL model is effective in improving students' critical thinking skills in science learning in junior high school.
KONSERVASI TUMBUHAN SECARA IN SITU, EX SITU DAN INOVASINYA UNTUK MENDUKUNG PENCAPAIAN SDGs KE-15 Fikri, Irvan Maulana; Nabila, Chelsea Eka Putrista; Rahayu, Enni Suwarsi; Retnoningsih, Amin
Prosiding Seminar Nasional Biologi Vol. 13 (2025)
Publisher : Prosiding Seminar Nasional Biologi

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Abstract

Sebagai salah satu negara dengan megabiodiversity terbesar di dunia, Indonesia menghadapi ancaman deforestasi, degradasi lahan, dan perubahan iklim yang menyebabkan banyak spesies tumbuhan menghadapi risiko kepunahan, bahkan sebagian besar belum teridentifikasi secara ilmiah. Oleh karena itu, diperlukan strategi konservasi yang efektif untuk menjaga keberlanjutan keanekaragaman hayati. Artikel ini bertujuan mengkaji strategi konservasi tumbuhan melalui pendekatan in situ dan ex situ serta menelaah berbagai inovasi berbasis riset mutakhir dalam mendukung pencapaian SDGs ke-15 atau Life on Land. Metode penelitian yang digunakan adalah Systematic Literature Review (SLR) dengan menganalisis artikel-artikel ilmiah bereputasi yang diterbitkan dalam 5-10 tahun terakhir. Hasil kajian menunjukkan bahwa konservasi in situ efektif dalam melindungi spesies di habitat alaminya dengan tetap mempertahankan interaksi ekologi, sementara konservasi ex situ sangat penting dilakukan agar pelestarian dalam menjaga spesies tanaman ini tidak punah sebab memungkinkan pelestarian plasma nutfah secara efektif melalui kebun raya, bank benih, dan kebun botani. Inovasi mutakhir seperti kultur jaringan, kriopreservasi, DNA barcoding, serta pemanfaatan teknologi digital dan remote sensing terbukti meningkatkan efektivitas konservasi tumbuhan. Penelitian ini menegaskan keterkaitan konservasi dengan SDGs 15, yakni mendukung upaya menghentikan kehilangan keanekaragaman hayati, melindungi ekosistem daratan, dan mendorong pemanfaatan sumber daya hayati secara berkelanjutan. Strategi in situ dan ex situ memiliki sifat saling melengkapi, sementara dukungan inovasi riset memperkuat efektivitas konservasi. Dengan demikian, konservasi tumbuhan berperan penting dalam menjamin kelangsungan hidup tumbuhan, khususnya spesies endemik Indonesia yang memiliki nilai ekologis tinggi.
Co-Authors Ahmad Muhlisin Amin Retnoningsih Dea Santika Rahayu Enni Suwarsi Rahayu Fikri, Irvan Maulana