Hasibuan, Nurul Fadillah, and Zainuddin Muchtar. “Development of a Coconut Coir Waste–Based Learning Medium (Ecowaste) to Improve Students’ Learning Outcomes”. Lensa: Jurnal Kependidikan Fisika, vol. 13, no. 2, Dec. 2025, pp. 243-58, doi:10.33394/j-lkf.v13i2.16792.