Northwestern is divided into four distinct "sub-schools": the A-Wing, B/G-Wing, C-Wing, and D/E/F-Wing. Each can house between 600 and 700 students. The original plan was to physically divide the school into four smaller schools, hence the design theme of the building. Sub-School A was intended to be the "School of Fine, Creative, and Performing Arts"; Sub-School B was to be the "School of Career and Consumer Education"; Sub-School C was to be a general facility that housed mainly elective courses, in addition the school's main offices, security office, and health center; and Sub-School D was to be "The School of Intensive and Specialized Instruction," which would house the school's honors and advanced placement program as well as the school's ESOL (English Speakers of Other Languages) program and Vocational Development (Special Education) program. Students were not to be permitted to interact with students from other sub-schools, and were to be isolated within their sub-school for the majority of the school day. Due to scheduling conflicts and feasibility issues with this concept, the idea was dropped before the new building ever opened, while the idea of smaller learning communities was retained and revised to become less restrictive and isolating.