"An intelligent tutoring system is computer software designed to simulate a human tutor's behavior and guidance. Because these systems are able to interpret complex student responses and can learn as they operate, they are able to discern where and why a student's understanding has gone astray and to offer hints to help the student understand the material at hand. Intelligent tutors provide many of the benefits of a human tutor to very large numbers of students. Intelligent tutoring systems can also provide real-time data to instructors and developers looking to refine teaching methods."