Wardatul Uyun, N., Padlurrahman, P., & Khairul Wazni , M. (2026). The Effects of Problem-Based Learning on Fourth-Grade Students’ Critical Thinking and Speaking Skills in English Instruction. IJE : Interdisciplinary Journal of Education, 4(1), 38–49. https://doi.org/10.61277/ije.v4i1.256