Santosa, T.A., Siagian, G., Festiyed, F., Razak, A., Zulyusri, Z., Diliarosta, S. and Yerimadesi, Y. 2023. Development of Higher Order Thinking Skill Instruments in Biology Learning on Ecology and Environment Materials. Edumaspul: Jurnal Pendidikan. 7, 1 (Mar. 2023), 1093-1100. DOI:https://doi.org/10.33487/edumaspul.v7i1.5855.