Sinulingga SP, mardiati, Sitepu DR. THE IMPACT OF USING INTERACTIVE VIDEO IN PROBLEM-BASED COOPERATIVE LEARNING ON STUDENTS’ COLLABORATION AND PROBLEM-SOLVING SKILLS IN JUNIOR HIGH SCHOOL. Perspektif [Internet]. 2026 Jul. 7 [cited 2026 Jul. 12];17(1):80-9. Available from: https://journal.uir.ac.id/index.php/Perspektif/article/view/25278