Chiropractic education is similar to medical or osteopathic education. An undergraduate degree stressing biological sciences is a prerequisite, followed by 4 years of professional education at one of the 24 chiropractic colleges in the United States. This education has the same emphasis on anatomy and physiology as medical or osteopathic education. During this period, the student gains a rich clinical experience in one of the many satellite clinics attached to the colleges. The Doctor of Chiropractic (DC) graduates with a high level of competence and confidence. After graduating, the candidates must pass the demanding four-part National Board Examinations. A chiropractor’s education, however, never ends. All states require doctors to complete regular postgraduate instruction for license renewal and to stay current on the latest research and treatment techniques.