Budi Suhati Lestari, Sowiyah and Dedy Hermanto Karwan 2020. The Principal’s Role as A Supervisor in Improving Teacher Performance at SDIT Baitul Jannah Bandar Lampung Performance . International Journal of Science, Technology & Management. 1, 4 (Nov. 2020), 246-251. DOI:https://doi.org/10.46729/ijstm.v1i4.72.