ISU's six colleges offer academic study in the natural and physical sciences, humanities, performing and visual arts, education, engineering, business, pharmacy and technology, with a total of over 285 available programs. Enrollment for the fall semester in 2011 stood at 14,489 total students, making ISU the second-largest major university in the State of Idaho in terms of full-time enrollment. The student-teacher ratio at ISU is 17:1.