DR. M. SHANKAR. Effectiveness of Problem Based Learning over Lecture Based Learning on the Development of Environmental Ethics Among Secondary School Students. International Journal of Indian Psychȯlogy , [S. l.], v. 10, n. 4, 2022. DOI: 10.25215/1004.010. Disponível em: https://ijip.co.in/index.php/ijip/article/view/111. Acesso em: 20 mar. 2026.