Theoretical Exploration of Secondary School English Teacher Professional Development from the Perspective of Ecosystem Theory. International Journal of Educational Development, [S. l.], v. 3, n. 3, p. 12–20, 2026. DOI: 10.63313/IJED.9076. Disponível em: https://academics.erytis.com/index.php/IJED/article/view/564. Acesso em: 21 jul. 2026.