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All Journal Omni-Akuatika SPEKTRA: Jurnal Kajian Pendidikan Sains
Afkar Afkar
Universitas Almuslim
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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IMPROVING STUDENTS' CONCEPTUAL UNDERSTANDING AND CRITICAL THINKING SKILLS THROUGH WORDWALL EDUCATIONAL GAMES IN ELEMENTARY SCHOOL Vera Idayani; Syifa Saputra; Afkar Afkar
SPEKTRA: Jurnal Kajian Pendidikan Sains Vol. 12 No. 1 (2026): SPEKTRA: Jurnal Kajian Pendidikan Sains
Publisher : Physics Education Study Program, Faculty of Education and Teacher Training, UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/frqas664

Abstract

The swift evolution of digital technology in the domain of primary education has reshaped instructional methods of innovative, interactive, and effective learning media. In this regard, Wordwall-based educational games are viewed as a promising tool to significantly improve students’ conceptual understanding as well as their critical thinking skills. This research was conducted to investigate the effectiveness of Wordwall educational games in enhancing elementary school students’ comprehension of concepts and their critical thinking abilities. The study employed a quantitative approach with a quasi-experimental method, specifically utilizing a non-equivalent control group design. The participants consisted of elementary school students who were divided into two groups: an experimental group and a control group. The experimental group was taught using Wordwall-based educational games, while the control group received instruction through traditional teaching methods. Data were collected using test instruments in the form of pre-tests and post-tests, which were designed to measure students’ conceptual understanding and critical thinking skills. The instruments were developed based on predetermined learning indicators and were validated by experts before being administered. Following rigorous statistical screening via normality and homogeneity tests, an independent samples t-test confirmed that the experimental group attained markedly superior post-test results in critical thinking and conceptual understanding compared to the control group. These findings demonstrate that the implementation of Wordwall educational games has a positive and by demonstrating a statistically significant influence on students' cognitive growth, Wordwall proves to be a robust digital medium that effectively facilitates higher-order thinking within primary school settings.
Resilience Under Pressure: Application of CRes Index to Monitor Coral Ecosystem Shifts in Jaboi, Aceh Post-Mass Bleaching Events Nadia Aldyza; Afkar Afkar
Journal Omni-Akuatika Vol 22, No 1 (2026): Omni-Akuatika May (In press)
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2026.22.1.1333

Abstract

This study assessed the resilience of coral reef ecosystems in the coastal waters of Jaboi, Sabang City, Weh Island, conducted in August 2025. The study area is an open marine zone that has not yet been designated as a marine protected area, highlighting the urgency of evaluating ecosystem resilience as a scientific basis for future conservation planning. Data collection was conducted using six parallel transects installed along the coastline at depths of 3 m and 7 m. Coral cover, turf algae, Crustose Coralline Algae (CCA), and rubble were recorded using 50 m line transects combined with underwater video analysis, while the density of blue sea stars (Linckia laevigata) and sea urchins was assessed using belt transects (100 m²). The results indicated that shallow waters exhibited higher live coral cover, greater CCA presence, and higher abundance of L. laevigata, reflecting a more stable ecosystem with strong recovery potential. In contrast, deeper waters showed increased dominance of turf algae and higher sea urchin density, suggesting emerging ecological pressures despite remaining within the high-resilience category. Differences in substrate quality between depths were identified as a key factor influencing benthic community structure. Overall, the coral reefs of Jaboi demonstrate relatively high resilience; however, early signs of ecological stress emphasize the need for continuous monitoring and proactive management. The findings support the use of the CRes Index as an effective tool for reef resilience assessment and provide essential baseline data to inform conservation zoning, restoration initiatives, and sustainable coastal management in Indonesia.
Co-Authors Nadia Aldyza Saputra, Syifa Vera Idayani