Evaluating the effectiveness of inquiry-based learning modules on cellular biology concepts for undergraduate biology education students: a randomized controlled study

Project Abstract

This study examines the effectiveness of inquiry-based learning (IBL) modules on cellular biology concepts among undergraduate biology education students, employing a randomized controlled design to determine whether IBL enhances conceptual understanding, procedural fluency, and scientific reasoning compared with traditional confirmation-based instruction. A total of 180 undergraduate education majors enrolled in introductory cellular biology courses at a mid-sized university were randomly assigned to either the IBL intervention or the traditional lecture-based control group, stratified by prior biology course performance to ensure comparable baseline achievement. The IBL group participated in a sequence of active learning activities that emphasized student-generated questions, collaborative hypothesis formation, experimental design, data collection and analysis, and iterative reflection, embedded within the core cellular biology content areas of membrane transport, cellular respiration, photosynthesis, cell cycle regulation, and gene expression. The control group received standard instructor-led lectures supplemented by problem sets, mirroring typical instructional practices. Over a 12-week instructional period, both groups completed identical nominal achievement assessments, including pre- and post-tests composed of multiple-choice items, short-answer prompts, and integrated performance tasks that required drawing and labeling cellular processes, constructing experimental designs, and justifying conclusions with evidence. Primary outcome measures focused on (1) mastery of cellular biology concepts, as indicated by normalized gains on concept inventories and rubric-based scoring of constructed explanations; (2) procedural fluency and experimental reasoning, assessed through performance tasks that required designing feasible experiments with appropriate controls and analyzing hypothetical results; and (3) scientific reasoning skills, evaluated via structured interviews and think-aloud protocols analyzed for hypothesis generation, control of variables, and data interpretation. Secondary outcomes included student engagement, measured by validated engagement surveys and classroom observation rubrics, and attitudes toward science, assessed through attitudinal inventories. Data were analyzed using ANCOVA to compare post-test scores while controlling for pre-test covariates, mixed-effects models to account for clustering within recitation sections, and thematic analysis of qualitative data from think-aloud protocols and interviews. Results revealed statistically significant improvements in the IBL group across conceptual mastery (p < .01; effect size moderate to large), experimental design competence (p < .001), and scientific reasoning (p < .01) compared with the control group. Engagement and positive attitudes toward biology showed meaningful gains in the IBL cohort (p < .05). Subgroup analyses suggested that benefits were particularly pronounced among students with weaker initial backgrounds and those who actively engaged in reflective practice and collaborative discourse. Mediation analyses indicated that enhanced scientific reasoning partially mediated the relationship between IBL participation and improved conceptual understanding. The study contributes empirical evidence supporting IBL as an effective instructional approach for the development of deep understanding in cellular biology within biology education programs, with implications for teacher professional development, curriculum design, and assessment practices in undergraduate science education. Limitations include single-site implementation and potential instructor learning effects, suggesting the need for multi-site replication and long-term follow-up to assess transfer to higher-order biology courses.

Project Overview

What This Project Is About

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A plain-language overview of evaluating how inquiry-based learning modules impact students’ understanding of cellular biology concepts among undergraduate biology education students. The project compares a teaching approach that emphasizes student-led questioning and experiments with traditional instruction to see which method helps students learn better and enjoy biology more.

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The Problem It Addresses

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Many biology courses rely on lectures that don’t always help students deeply grasp cellular concepts. This project investigates whether asking students to explore, experiment, and discuss improves understanding and retention compared with standard teaching methods. It also looks at whether this approach supports different learning styles and future classroom practices.

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Objectives of the Project

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1. Compare learning gains between inquiry-based and traditional instruction.
2. Assess student engagement and motivation under both teaching methods.
3. Identify which cellular biology topics benefit most from inquiry-based learning.
4. Provide practical recommendations for biology teacher education.

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What You Will Do Step by Step

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1. Review relevant literature on inquiry-based learning and cellular biology concepts.
2. Design two teaching modules: one inquiry-based, one traditional, focused on the same topics.
3. Recruit undergraduate biology education students and assign them to groups.
4. Deliver the two teaching approaches in parallel sessions.
5. Collect data via pre- and post-tests, surveys, and short interviews.
6. Analyze learning gains and attitudes using basic statistics (e.g., average scores, effect sizes).
7. Compare results to determine which method is more effective.
8. Summarize findings and propose classroom implications.

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Expected Outcome

Expect that inquiry-based learning will lead to higher conceptual gains and greater engagement, especially for complex cellular topics, with actionable guidance for biology teacher training programs and curriculum designers.