Professional Development, Competence and Teaching Effectiveness among Secondary School Teachers: A Quantitative Study. Interdisciplinary Journal for Analysis in Education, Science, Commerce, Management & Law, [S. l.], v. 2, n. 2, p. 18–25, 2026. Disponível em: https://ijaescml.org/index.php/journal/article/view/18. Acesso em: 17 sep. 2026.