One of the continuing challenges for medical schools both here in the United States and around the world is to find ways to select the students who will have the best chance of successfully completing their education. The goal of a good medical education, after all, is to train students who go on to become doctors, helping to fill the enormous global demand for well-trained, competent physicians. What might surprise many students, however, is how many different ways medical colleges around the world have come up with to find these ideal candidates–and how widely medical education varies from one country to another.