Nugroho BS, Prayitno HJ, Utami RD, Purnomo E, Jamali A. Development of Learning Materials Based on Meaningful Learning as an Effort to Foster Green Behavior in Elementary Schools. jdl [Internet]. 2025 Nov. 27 [cited 2026 Apr. 20];2(1):12-8. Available from: https://journals2.ums.ac.id/jdl/article/view/11559