The ideal size for a typical comprehensive high school is large enough to offer a variety of classes, but small enough that students develop a sense of community. Some research has suggested that
academic achievement is best when there are about 150 to 250 students in each grade level, and that above a total school size of 2,000 for a secondary school, academic achievement and the sense of school community decline substantially. Arguments in favor of larger schools tend to focus on
economy of scale. For example, a single basketball court could serve a school with 200 students just as well as a school with 500 students, so construction and maintenance costs, on a per-student basis, can be lower for larger schools. However, cost savings from larger schools have generally not materialized, as larger schools require more administrative support staff, and rural areas see the potential savings offset by increased transportation costs. Larger schools can also support more specialization, such as splitting students into advanced, average, and basic
tracks, offering a greater variety of classes, or sponsoring a greater number of
extra-curricular activities. (Some of these benefits can also be achieved through smaller but specialized schools, such as a dedicated
special school for students with disabilities or a
magnet school for students with a particular subject-matter interest.) In terms of structure, organization, and relationships, larger schools tend to be more
hierarchical and
bureaucratic, with fewer and weaker personal connections and more rigidly defined, unvarying roles for all staff. Teachers find that large schools result in more information to process in the larger environment (e.g., announcements about 100 programs instead of just 10) and that as individuals they form fewer relationships with teachers outside of their primary subject area. Smaller schools have less
social isolation and more engagement. These effects cannot be entirely overcome through implementation of a
house system or "
school within a school" programs. ==Building design specifications ==