Tawinno , J. and Jantakoon, J. 2025. The Development of a Protecting the World Science Club Activities Curriculum Based on Challenge-Based Learning Collaborative Systems Thinking to Enhance Complex Problem-Solving Competency Among Hight School Students. Journal of Practical Studies in Education . 6, 4 (Jun. 2025), 54-66. DOI:https://doi.org/10.46809/jpse.v6i4.121.