Firdaus F, Akib I, Sukmawati S. A Conceptual Framework for Implementing a Problem-Solving Based Mathematics Curriculum in Vocational Education. PIJED [Internet]. 2025 Dec. 2 [cited 2026 Aug. 25];4(2):608-15. Available from: https://www.ejournal.ppsdp.org/index.php/pijed/article/view/766