Design and evaluation of a community-based chemistry outreach toolkit for high-school learners

Thesis Abstract

This study addresses the persistent gap between formal chemistry education and community science engagement by designing and evaluating a contextually relevant outreach toolkit for high-school learners in urban and peri-urban settings. The problem is twofold limited access to hands-on chemistry experiences in schools with constrained resources, and insufficient connection between classroom content and real-world chemical phenomena. The aim is to develop a scalable, low-cost outreach toolkit that strengthens inquiry-based learning, scientific literacy, and community involvement. Specific objectives are (1) to co-create a modular toolkit incorporating safe, affordable experiments aligned with national chemistry standards; (2) to implement the toolkit across five partner high schools representing diverse socioeconomic backgrounds; (3) to evaluate instructional effectiveness through formative and summative assessments, student attitudes, and teacher feedback; (4) to examine changes in students’ conceptual understanding of core chemistry topics; (5) to explore the toolkit’s capacity to foster community engagement and mentorship pathways; and (6) to refine the toolkit for dissemination and policy uptake. The study adopts a mixed-methods design grounded in constructivist and socio-constructivist theories, drawing on Vygotsky’s zone of proximal development to frame scaffolded learning and Bandura’s social cognitive theory to capture self-efficacy and motivation shifts. A quasi-experimental approach with a matched control group will be employed. The population comprises tenth-grade students (n ? 600) enrolled in five urban and peri-urban high schools, with schools matched on size, demographics, and prior achievement. A sample of 400 students (approximately 80 per school) will participate in the intervention, while 200 students (40 per school) will serve as a comparison group receiving standard curricula. Data collection instruments include (i) a validated concept inventory assessing core chemistry domains (stoichiometry, bonding, kinetics, thermodynamics) administered pre-, mid-, and post-intervention; (ii) a Likert-scale attitude and motivation survey adapted from established science-identity instruments; (iii) a teacher observation protocol capturing fidelity, engagement, and implementation challenges; (iv) semi-structured interviews and focus group discussions with students, teachers, and community mentors; (v) performance tasks and lab notebooks scored against a standardized rubric; (vi) a toolkit usability and feasibility checklist completed by teachers. Instrument validity and reliability will be established through expert review (n=6) and pilot testing (n=120 students), with Cronbach’s alpha targets ?0.78 for multi-item scales. The data analysis plan includes (i) descriptive statistics to profile participants and baseline equivalence; (ii) ANCOVA to compare post-test concept inventory scores while controlling for pre-test scores; (iii) repeated-measures ANOVA to track learning trajectories; (iv) thematic analysis of qualitative data following Braun and Clarke’s approach to identify themes related to engagement, collaboration, and transfer of learning; (v) regression analyses to examine predictors of improved understanding and interest, including attendance, collaboration quality, and mentor involvement; (vi) content analysis of lab reports for evidences of scientific reasoning. A convergent parallel design will integrate quantitative and qualitative findings to provide a holistic evaluation of effectiveness, feasibility, and contextual fit. Key expected findings include statistically significant gains in conceptual understanding in intervention classrooms relative to controls, elevated science attitudes and self-efficacy, higher incidence of student-initiated inquiry, and positive feedback on community mentor roles. The study anticipates practical constraints such as time-pressure in classrooms and variability in mentor availability, which will be addressed via modular design and flexible scheduling. The contribution to knowledge lies in a rigorously evaluated, scalable outreach toolkit that integrates community resources with classroom practice, advances inquiry-based learning in under-resourced settings, and provides a model for stakeholder collaboration among schools, universities, and community organizations. The study will inform policymakers and educators about effective deployment of low-cost, high-impact chemistry outreach, and offer a framework for ongoing toolkit refinement and nationwide dissemination. The main conclusion will articulate the toolkit’s efficacy in enhancing conceptual understanding and student engagement, while recommendations will focus on implementation guidelines, professional development for teachers, mechanisms for sustaining mentor networks, and strategies for embedding the toolkit within existing curricula.