Evaluating the Effectiveness of Inquiry-Based Learning Modules on Students’ Conceptual Understanding of Environmental Science Topics in Senior High School Biology Courses

Project Abstract

This study investigates how inquiry-based learning (IBL) modules influence senior high school students’ conceptual understanding of environmental science topics within biology courses. Employing a quasi-experimental design, the research compares outcomes between two intact classes an experimental group engaging with carefully designed IBL modules and a control group following traditional instruction over a 12-week period. A mixed-methods approach integrates quantitative measures of conceptual understanding with qualitative insights from student interviews, teacher reflections, and classroom observations to triangulate findings and illuminate mechanisms of change. Quantitatively, the study develops and deploys a validated assessment instrument aligned with current environmental science concepts, emphasizing interrelated notions such as ecosystem services, biogeochemical cycles, climate dynamics, biodiversity, human-environment interactions, and sustainable practices. Pre-tests establish baseline understanding, while post-tests capture immediate learning gains; a delayed post-test administered after six weeks assesses retention. Effect sizes, ANCOVA controlling for prior achievement, and hierarchical linear modeling account for nested data structures (students within classes) and potential covariates such as science self-efficacy and prior inquiry exposure. Reliability analyses ensure internal consistency of instruments, and item response theory examines model fit for evaluating conceptual change rather than procedural recall. Qualitatively, semi-structured interviews with a purposeful sample of students from both groups explore cognitive processes, epistemic beliefs, and shifts in conceptual frameworks. Classroom observations using a standardized rubric document inquiry behaviors, teacher scaffolding strategies, collaborative discourse quality, and the frequency of evidence-based reasoning. Teacher interviews capture pedagogical adaptations, perceived challenges, and professional growth related to implementing IBL. Thematic analysis identifies patterns related to conceptual restructuring, causality reasoning, and transfer of understanding to real-world environmental issues. Data integration follows a convergent parallel design, where quantitative results are juxtaposed with qualitative themes to interpret how IBL modulates conceptual understanding and to uncover contextual factors that mediate or moderate effects, such as classroom culture, resource availability, and teacher professional development. The study also examines equity considerations, analyzing differential outcomes across gender, socio-economic status, and prior achievement to determine whether IBL supports inclusive science learning. Expected findings indicate that students in the IBL condition will demonstrate greater gains in conceptual understanding, higher levels of explanatory coherence, and improved ability to use evidence to justify scientific claims about environmental phenomena. Qualitative data are anticipated to reveal enhanced metacognitive awareness, autonomous inquiry behaviors, and richer disciplinary discourse among peers. The research aims to offer a validated framework for integrating IBL in senior high school biology with environmental science content, providing actionable recommendations for curriculum designers, teacher educators, and policymakers to promote sustainable scientific literacy through inquiry-centered pedagogy. Limitations include the quasi-experimental design’s non-random assignment and potential variability in teacher fidelity to IBL protocols, which will be mitigated through standardized training and fidelity checks.

Project Overview

What This Project Is About

---

The project explores how using inquiry-based learning modules affects students’ grasp of key environmental science ideas in senior high school biology classes. It looks at whether hands-on questions, experiments, and guided investigations help students understand topics like ecosystems, pollution, and climate change better than traditional teaching methods.

---

---

The Problem It Addresses

---

---

---

Objectives of the Project

---

1. Assess students’ baseline understanding of Environmental Science topics.
2. Implement inquiry-based learning modules in selected classes.
3. Compare conceptual understanding before and after using the modules.
4. Identify which elements of inquiry-based learning are most beneficial.
5. Provide practical recommendations for teachers and schools.

---

---

What You Will Do Step by Step

---

1. Review relevant literature on inquiry-based learning and environmental science.
2. Design or adapt inquiry-based modules aligned with the biology curriculum.
3. Train teachers and implement the modules in classrooms.
4. Collect data through concept tests, student reflections, and observations.
5. Analyze data to compare pre- and post-module understanding.
6. Interpret results and discuss implications for classroom practice.
7. Document challenges and best practices for scalability.

---

---

Expected Outcome

Expected outcomes include improved conceptual scores, greater student engagement, and clearer links between inquiry activities and core environmental science concepts. The project should provide evidence on the value of inquiry-based approaches and practical guidance for effective classroom adoption.