Nurwidodo, N., Sri Wahyuni, Iin Hindun, and Nur Fauziah. 2024. “The Effectiveness of Problem-Based Learning in Improving Creative Thinking Skills, Collaborative Skills and Environmental Literacy of Muhammadiyah Secondary School Students”. Research and Development in Education (RaDEn) 4 (1):49-66. https://doi.org/10.22219/raden.v4i1.32123.