Transforming Elementary School Students’ Academic Achievement through Instructional Leadership, Inclusive School Culture, and Continuous Teacher Professional Development

This study examines the partial and simultaneous relationships of instructional leadership, inclusive school culture, and continuous teacher professional development with student academic achievement in public elementary schools. A quantitative approach with an ex post facto design was employed. The population comprised 135 teachers from 14 public elementary schools in Kledung District, Temanggung Regency, Central Java, all of whom were included through total sampling. Data were collected using five-point Likert-scale questionnaires completed by teachers. Student academic achievement was assessed through teachers' evaluations of students' cognitive, affective, and psychomotor competencies based on their observations and assessments during the learning process. The collected data were analyzed using descriptive statistics, classical assumption tests, and multiple linear regression. The findings indicate that instructional leadership, inclusive school culture, and continuous teacher professional development are each positively and significantly associated with student academic achievement. Simultaneously, the three predictors demonstrate a statistically significant relationship with student academic achievement. The coefficient of determination (R²) of 0.473 indicates that these variables jointly explain 47.3% of the variance in student academic achievement, while the remaining 52.7% is associated with factors outside the research model. Among the three predictors, continuous teacher professional development demonstrates the strongest relative predictive relationship. These findings highlight the importance of integrating instructional leadership, inclusive school culture, and continuous teacher professional development into educational management strategies to support instructional quality, equitable learning opportunities, and improved student academic achievement in elementary schools.