A lecture hall or lecture theatre is a large room used for lectures, typically at a college or university. Unlike flexible lecture rooms and classrooms with capacities normally below one hundred, the capacity of lecture halls can sometimes be measured in the hundreds. Lecture halls frequently have tiered seating, with those in the rear sat higher than those at the front.
Lecture halls differ from other types of learning spaces, seminar rooms in particular, in that they allow for little versatility in use, although they are no less flexible than, for example, chemistry laboratories. Experimentation, group work, and other contemporary educational methods are not practicable in a lecture hall. On the other hand, lecture halls are excellent for focusing the attention of a large group on a single point, either an instructor or an audio-visual presentation, and modern lecture halls often feature audio-visual equipment. A microphone and loudspeakers are common to help the lecturer be heard, and projection screens may be used for large displays.
