Prafnesia NL, Idrus I, Jumiarni D. Design of Instructional Materials with the Cooperative Learning Model Numbered Heads Together (NHT) for Junior High School. Biol. Sci. Pedag. J. [Internet]. 2025 Nov. 1 [cited 2026 May 27];1(1):16-25. Available from: https://ejournal.edukhatulistiwa.com/index.php/biosped/article/view/236