KHALIQ, Saima; ALAM, Muhammad Tayyab; MUSHTAQ, Muhammad. An Experimental Study to Investigate the Effectiveness of Project-Based Learning (PBL) for Teaching Science at Elementary Level. International Journal of Academic Research in Progressive Education and Development, [S. l.], v. 4, n. 1, 2015. Disponível em: https://ijarped.com/index.php/journal/article/view/222. Acesso em: 2 aug. 2025.