Sihaloho, S. M.; Saragih, M. J. PENERAPAN MODEL PROBLEM BASED LEARNING UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS SISWA PADA PEMBELAJARAN MATEMATIKA [IMPLEMENTATION OF THE PROBLEM BASED LEARNING MODEL TO IMPROVE STUDENTS’ CRITICAL THINKING SKILLS IN MATHEMATICS LEARNING]. JOHME 2024, 8, 101-115.