Comparative Effectiveness of Inquiry-Based vs. Traditional Biology Teaching Methods Across Cultures

Thesis Abstract

This study investigates the comparative effectiveness of inquiry-based learning (IBL) versus traditional biology teaching methods across diverse cultural contexts, addressing the persistent gap in understanding how pedagogical approaches interact with cultural factors to influence student achievement, motivation, and scientific reasoning. The aim is to determine whether IBL yields superior learning outcomes relative to traditional instruction and to examine how cultural variables modulate this effect. Specific objectives include (1) comparing student achievement in biology concepts between IBL and traditional teaching across three culturally distinct school communities; (2) assessing changes in scientific reasoning and inquiry skills using a validated rubric; (3) evaluating student engagement and motivation through standardized scales; (4) exploring teacher perceptions and instructional fidelity of IBL implementation; (5) identifying contextual factors that mediate or moderate instructional effectiveness, such as classroom culture, curricular alignment, and resource availability. The study adopts a cross-national mixed-methods design, incorporating quasi-experimental and interpretive components. The population comprises upper-secondary biology classes in three culturally varied urban districts within Country X, comprising 18 schools, with a target sample of 540 students (30 classes per condition) and 36 biology teachers. A stratified cluster sampling approach ensures proportional representation of gender, socioeconomic status, and prior achievement. In the quantitative strand, schools are assigned to IBL or traditional conditions using matched-pair sampling based on baseline performance, with pretest–posttest measures administered over a full academic term (12 weeks). Instruments include a biology achievement test (reliable and normed for the three contexts), a standardized scientific reasoning rubric administered to a subset of students, and the Science Motivation Questionnaire II. The qualitative strand collects semi-structured teacher interviews, classroom observations, and focus groups with students, guided by the TPACK framework and the cultural-historical activity theory to interpret instructional actions within sociocultural contexts. Validity and reliability are addressed through pilot testing, triangulation, inter-rater reliability checks for observations (Cohen’s kappa ? 0.80), and instrument adaptation with back-translation where necessary. Data analysis employs a sequential explanatory approach. Quantitative data are analyzed using multilevel linear modeling to account for nested data (students within classes within schools) and to test main effects of teaching method, cultural context, and their interaction, with covariates including prior achievement and SES. Mediation analyses explore the role of inquiry-based engagement on achievement and scientific reasoning. Qualitative data are analyzed thematically using an iterative coding scheme, with member checking and triangulation against quantitative findings. The expected findings anticipate that IBL will produce higher gains in biology achievement and scientific reasoning than traditional methods, with effect sizes moderated by cultural factors (e.g., instructional norms, cultural attitudes toward inquiry, and language of instruction). It is hypothesized that higher fidelity of IBL implementation correlates with greater learning gains, and that student motivation mediates part of the effect. The study contributes to knowledge by generating cross-cultural evidence on how inquiry-based pedagogy interacts with cultural contexts to influence learning outcomes in biology, informing theory on culturally responsive science education and extending the applicability of inquiry-based models across diverse settings. The findings are expected to yield practical implications for curriculum designers, teacher preparation programs, and policy makers, highlighting strategies to adapt IBL for varying cultural milieus without compromising core inquiry principles. The main conclusion envisaged is that context-sensitive IBL enhances biology learning more effectively than traditional methods in cultures with supportive inquiry norms and adequate resource support, whereas traditional approaches may be more resilient where inquiry demands exceed teacher capacity or where language and assessment align poorly with inquiry practices. Recommendations include targeted professional development to ensure fidelity of IBL implementation, scaffolding for scientific reasoning within multilingual classrooms, investment in classroom resources to support inquiry tasks, and policy alignment to integrate culturally responsive assessment practices alongside inquiry-based curricula.