Ufiqurrohman, U. and Antika, L.T. 2023. The Effect of Problem-based Learning on Students Collaboration Skills in Islamic Boarding Schools. DIDAKTIKA : Jurnal Penelitian Tindakan Kelas. 1, 1 (Apr. 2023), 1–6. DOI:https://doi.org/10.63757/jptk.v1i1.1.