Abstract:

This systematic literature review synthesises evidence from 22 peer-reviewed empirical studies published between 2015 and 2025 to examine how teacher professional development (TPD) influences student achievement and motivation in natural science education at school level. Guided by Constructivist Learning Theory and Self-Determination Theory (SDT), the review evaluates how TPD interventions shape teachers’ instructional practices, classroom environments, and the learning conditions that support learners’ autonomy, competence, and relatedness. Comprehensive searches were conducted across ERIC, Scopus, Web of Science, PsycINFO, JSTOR, and Google Scholar, and the review followed PRISMA procedures for study identification, screening, and eligibility assessment. Studies were appraised using the Critical Appraisal Skills Programme (CASP) and Cochrane risk-of-bias tools to ensure methodological transparency.

Across the corpus, strong and consistent evidence indicates that sustained, content-focused, collaborative, and inquiry-based TPD significantly enhances student academic performance in the natural sciences. Programmes that strengthen teachers’ pedagogical content knowledge, inquiry-oriented instructional strategies, and capacity to design cognitively engaging learning environments were particularly effective in improving learners’ conceptual understanding and assessment outcomes. Motivational gains were also evident: studies informed by SDT showed that when teachers implemented autonomy-supportive practices, formative feedback, collaborative learning structures, and contextualised science activities, students demonstrated greater engagement, persistence, and intrinsic motivation toward science learning.

However, the review also shows that the impact of TPD is mediated by contextual moderators, particularly in resource-constrained systems such as South Africa. Limited laboratory facilities, linguistic diversity, large class sizes, and inconsistent provincial support often restricted the translation of training into long-term pedagogical change. Only a small proportion of studies used longitudinal designs, and few explicitly examined how TPD effects were sustained over time or across diverse schooling environments.

Overall, the evidence demonstrates that effective TPD is a critical driver of science learning outcomes when it is sustained, contextually responsive, theoretically grounded, and integrated with school-level support systems. The review recommends the development of scalable, locally adaptable TPD models that incorporate continuous mentoring, curriculum alignment, and structured evaluation. Future research should prioritise longitudinal and context-sensitive designs to deepen understanding of how TPD enhances both achievement and motivation in natural science classrooms.

Keywords:

Teacher Professional Development (TPD), Natural Sciences Education, Student Motivation and Achievement.