Austriansyah, Marungkil Pasaribu, and Supriyatman. 2025. “Development of HOTS LKPD Using a Problem Based Learning Model on Magnetic Materials to Improve Students’ Collaborative and Critical Thinking Skills in Junior High School”. International Journal of Education, Humaniora, and Social Studies 1 (2): 37-44. https://doi.org/10.63895/j30321271.2024.v1.i2.pp37-44.