In the United States, a law school is an institution where students obtain a professional education in law after first obtaining an undergraduate degree. Law schools in the U.S. confer the Juris Doctor degree (J.D.), which is a professional doctorate, and is the degree usually required to practice law in the United States, and the final degree obtained by most practitioners in the field. Law schools' Juris Doctor programs are usually three-year programs if done full-time or four-year programs if done via evening classes. Some U.S. law schools include an Accelerated JD program.