Additionally, renovations involved removing the entire interior of areas being renovated, such that today's classrooms are not merely redone versions of the original rooms, but rather, entirely new rooms. One long-debated result of this renovation was that in removing the interior and building it anew, walls of concrete brick and glazed tiling were removed, and replaced uniformly with drywall. As a result, the walls are easily damaged and frequently require patching or painting. One other change was that many windows were covered or eliminated in the renovation. For example, the exterior of the building today reveals that along the upper section of the gymnasium, stuccoed panels cover what had been large windows. And most classrooms lost half their window area as glass bricks were covered over, leaving only the lower, operable parts of the windows exposed. The rear wall of the interior of the auditorium also once was lined with windows covered with drapes; renovations replaced the windows with walls. The only area of the school that appears nearly as it did when the building first opened is the auditorium and gymnasium lobby, which still combine terrazzo flooring, chrome, blond varnished wood, and glazed bricks, giving this area the character the entire building once had.