This paper examines the impact of daylight performance on classroom orientation in Beirut district and its suburbs. Daylight conditions in educational buildings have been of interest since the discovery of artificial light in the nineteenth century. Classroom orientation is crucial in optimizing daylight performance, which can positively impact student health, learning achievements, and psychology. In Lebanon, Government Decree No. 90911 recommends classrooms to have a southern orientation, with the longest part of the southern facade facing south. However, the decree does not provide any further ...