ÇULHA, Davut. Applying a new game element called backward grading for student engagement. Revista Educación en Ingeniería, [S. l.], v. 19, n. 37, p. 1–8, 2024. Disponível em: https://educacioneningenieria.org/index.php/edi/article/view/1278. Acesso em: 24 feb. 2024.