Almohammadi, Iman Saed. “The Level of Inclusion of Twenty-First-Century Skills in the Mathematics Textbook for the Second Grade of Secondary School in the Kingdom of Saudi Arabia”. Journal of Curriculum and Teaching Methodology 3, no. 3 (March 29, 2024): 43–66. Accessed December 30, 2025. https://journals.ajsrp.com/index.php/jctm/article/view/7367.