Cross-Sectional Analysis of Inquiry-Based Learning in Science Education

Thesis Abstract

This study addresses the persistent gap between the ideal of inquiry-based learning (IBL) and its inconsistent implementation in science classrooms, which undermines students’ conceptual understanding and scientific inquiry skills across diverse educational contexts. The aim is to conduct a cross-sectional analysis of IBL practices, student engagement, and achievement in science education, to identify how instructional approaches correlate with learning outcomes and to determine contextual factors that influence IBL effectiveness. Specific objectives are (1) to compare science achievement and inquiry skills between classrooms employing varying degrees of IBL implementation; (2) to examine the relationship between teacher beliefs about science, classroom discourse patterns, and students’ inquiry-oriented performance; (3) to assess gender, grade-level, and school-type (public vs. private) moderators of IBL impact; and (4) to derive a model linking IBL practices to student outcomes, accounting for pedagogical and contextual covariates. A mixed-methods, cross-sectional design was employed. The study sampled 60 science teachers and their approximately 2,400 students from 60 secondary schools across two regions, representing urban and rural settings. Quantitative data were collected through structured classroom observations using a validated IBL-MicroCoding instrument, student achievement tests aligned with national science standards, and a 40-item Inquiry Skills Inventory administered at the end of the term. Teacher questionnaires captured beliefs about science teaching and perceived feasibility of IBL, while student surveys gathered motivation and attitudes toward science. Qualitative data consisted of 24 semi-structured classroom interviews with teachers and 12 focus groups with students to illuminate contextual factors and discursive practices. Validity and reliability were established through pilot testing, inter-rater reliability checks (Cohen’s kappa = 0.82 for observation coding), and Cronbach’s alpha values exceeding 0.78 for all scales. Quantitative analyses included multilevel hierarchical linear modeling to account for nesting of students within classes and schools, multiple regression to assess relationships between IBL intensity and achievement and inquiry skills, and interaction tests to identify moderators such as gender and school type. Structural equation modeling (SEM) was used to test the proposed theoretical model linking teacher beliefs, discourse patterns, IBL practices, and student outcomes. Qualitative data were analyzed using thematic analysis informed by grounded theory, with triangulation against quantitative findings to enhance interpretive validity. The theoretical framework integrates constructivist theories of science education and sociocultural perspectives on practice, drawing on Piagetian constructivism and Vygotskian social constructivism, and positions the study within the domain of inquiry-based pedagogy as articulated by Dewey and later by individual constructivist scholars. The study explicitly engages with contemporary critiques of IBL implementation, including scaffolding, assessment alignment, and equitable access to inquiry experiences. Preliminary expectations indicate that higher-intensity IBL enactments will be positively associated with both achievement and higher-order inquiry skills, with effect sizes moderate (f2 ? 0.10–0.25) after controlling for prior achievement, socioeconomic status, and teacher experience. It is anticipated that strong alignment between assessment tasks and inquiry activities, coupled with supportive classroom discourse, will strengthen the relationship between IBL and outcomes. The study is expected to reveal differential effects by gender and school-type, with urban schools potentially exhibiting broader benefits when coupled with targeted professional development for teachers. The study contributes to knowledge by providing robust, multi-level evidence on the effectiveness of IBL in diverse secondary science contexts, delineating contextual conditions under which IBL yields the greatest gains, and offering a validated model for policymakers and practitioners. Findings will inform teacher professional development, curriculum design, and classroom planning, emphasizing the need for balanced scaffolding, authentic assessment, and equitable access to inquiry experiences. The main conclusion is that while IBL holds substantial promise for enhancing scientific thinking and achievement, its impact is contingent on deliberate implementation, alignment of assessments, and supportive instructional discourse. Recommendations include (1) implementing targeted professional development focused on scaffolding and argumentation-rich discourse, (2) aligning summative assessments with inquiry tasks, (3) ensuring equitable access to high-quality inquiry experiences across schools, and (4) fostering ongoing classroom-based reflective practices to monitor and adapt IBL enactments.