ALMUTAIRI, Nasser Mohammed. The effectiveness of an enrichment teaching program based on STEM approach in developing the 21st skills of intermediates school students. Journal of Educational and Psychological Sciences, New Mexico, United States, v. 7, n. 44, p. 66–81, 2023. DOI: 10.26389/AJSRP.R070923. Disponível em: https://www.ajsrp.ojsexpert.com/index.php/jeps/article/view/7104. Acesso em: 20 dec. 2025.