Restulingtyas, L.H., Ricky, R. and Tarigan, Z.J.H. 2025. The Impact of Chain of Servant Leadership on the Effectiveness of Classroom Instruction. Aletheia Christian Educators Journal. 6, 2 (Oct. 2025), 113–123. DOI:https://doi.org/10.9744/aletheia.6.2.113-123.