N.S.M. Salah El-Din, L.H.S. Al-Quarini, M.A.-H. Lashin and M.E. Ammar 2022. Electronic Developmental Supervision and Its Impact on Teachers’ Attitudes and Improving Their Teaching Performance in Basic Education Schools in the Sultanate of Oman: A Quasi-Experimental Study. Journal of Educational Sciences – Qatar University. 18, 18 (Mar. 2022). DOI:https://doi.org/10.29117/jes.2021.0064.