Development of a Non-Textbook on Biodiversity in Sumatra Based on the Sustainable Development Goals to Improve Critical Thinking and Problem-Solving Skills

Tagonna E. Siburian (Postgraduate Biology Education Study Program, State University of Medan)
Ely Djulia (Postgraduate Biology Education Study Program, State University of Medan)
Widya Arwita (Postgraduate Biology Education Study Program, State University of Medan)

Jurnal Perspektif
Vol 10 No 1 (2026): Jurnal Perspektif

This study aims to create a non-textbook on SDGs-based biodiversity in Sumatra with practical applications that improve students' critical thinking and problem-solving skills. This ADDIE-based development research involved two classes of grade X students at SMA Negeri 1 Paranginan: experimental and control. Independent-samples t-tests were used to assess the feasibility, practicality, and effectiveness of the research data. This study found that the non-textbook on SDGs-based biodiversity in Sumatra is playful, practical, and effective in developing critical thinking and problem-solving skills of grade X students of SMA Negeri 1 Paranginan. Feasibility was met based on validation results from materials (80.0%), learning (89.3%), and media/design experts (78.7%), indicating feasibility. The biology instructor’s response questionnaire (83.6%) and the student's response questionnaire (76.2%) indicated a practical orientation. The evaluation results showed effectiveness, with N-gain values of 75.7% for critical thinking skills and 65.5% for problem-solving skills in the experimental class. Hypothesis testing confirmed the effectiveness (Sig.= 0.000 < 0.05) and (Sig.= 0.007 < 0.05).