NERITA SETIYANINGTIYAS. Implementing 21st Century Skills in Indonesian Private High Schools: Challenges, Strategies, and Student Outcomes. International Journal of Christian Education and Philosophical Inquiry, [S. l.], v. 2, n. 1, p. 61–79, 2025. DOI: 10.61132/ijcep.v2i1.431. Disponível em: https://international.aripafi.or.id/index.php/IJCEP/article/view/431. Acesso em: 8 mar. 2026.