“PENGARUH PROBLEM BASED LEARNING BERBANTUAN WORDWALL TERHADAP HASIL BELAJAR DAN KEMAMPUAN BERPIKIR KRITIS SISWA KELAS XI SMA NEGERI 2 PERCUT SEI TUAN” (2026) JOURNAL OF SCIENCE AND SOCIAL RESEARCH, 9(2), pp. 1876–1883. doi:10.54314/jssr.v9i2.6037.