THE EFFECT OF STEM-PjBL ON SEVENTH-GRADE STUDENTS’ CREATIVE THINKING SKILLS IN LEARNING SUBSTANCES AND THEIR CHANGES. universe [Internet]. 30 Juni 2026 [dikutip 13 Agustus 2026];7(1):61-6. Tersedia pada: http://universe.ppj.unp.ac.id/index.php/universe/article/view/942