“OPBL Learning Model on Problem Solving Ability in Basic Programming Subjects in Vocational High Schools: Model Pembelajaran OPBL Terhadap Kemampuan Pemecahan Masalah Pada Mata Pelajaran Pemrograman Dasar Di Sekolah Menengah Kejuruan”. 2023. Indonesian Journal of Education Methods Development 18 (1): 10.21070/ijemd.v21i.726. https://doi.org/10.21070/ijemd.v21i.726.