Purnawati, R., Suryanti, S., & Mariana, N. (2026). Integrating the Ethno-STEAM-Based Si PURI Worksheet to Foster Critical Thinking Skills among Fourth-Grade Elementary School Students in Indonesia . Journal of Learning Improvement and Lesson Study, 6(1), 149–167. https://doi.org/10.24036/jlils.v6i1.222