Girsang M. THE APPLICATION OF THE NHT TYPE COOPERATIVE LEARNING MODEL TO IMPROVE BIOLOGY LEARNING OUTCOMES IN CLASS XI SMA NEGERI 10 MEDAN. JPP [Internet]. 2021 Jul. 6 [cited 2026 Jan. 17];9(2). Available from: https://jurnal.unimed.ac.id/2012/index.php/pelita/article/view/25118