Admissions to medical school in the United States is generally considered highly competitive, although there is a wide range of competitiveness among different types of schools. Admissions criteria include grade point averages, Medical College Admission Test scores, letters of recommendation, and interviews. Most students have at least a bachelor's degree, usually in a biologic science, and some students have advanced degrees, such as a master's degree. Medical School in the United States does not require a degree in biological sciences, but rather a set of undergraduate courses in scientific disciplines thought to adequately prepare students.