Chiropractic education trains students in chiropractic. The entry criteria, structure, teaching methodology and nature of chiropractic programs offered at chiropractic schools vary considerably around the world. Students are trained in academic areas including scopes of practice, neurology, radiology, microbiology, psychology, ethics, biology, gross anatomy, chemistry/biochemistry, spinal anatomy, phlebotomy, neurology and more. Prospective students are also usually trained in clinical nutrition, public health, pediatrics and other health or wellness related areas. The entry criteria, structure, teaching methodology and nature of chiropractic programs offered at chiropractic schools vary considerably around the world, although in the United States programs are required to teach specific areas for accreditation purposes. A 2005 World Health Organization (WHO) guideline states regardless of the model of education utilized, prospective chiropractors without relevant prior health care education or experience must spend no less than 4200 student/teacher contact hours (or the equivalent) in four years of full‐time education. This includes a minimum of 1000 hours of supervised clinical training. Students must pass boards administered by the National Board of Chiropractic Examiners (NBCE) to be licensed to practice in a U.S state or territory. The boards consists of parts I, II, III, and IV, as well as other additional tests required by state or if desired by students such as the physiotherapy exam.