Validity Analysis of the Science Learning Tools using OrDeP2E Models with Contextual Approaches to Improve Creative Thinking Skills of Junior High School Students. JPF [Internet]. 28 April 2020 [dikutip 1 Agustus 2026];8(2):177-89. Tersedia pada: https://journal.unismuh.ac.id/index.php/jpf/article/view/3226