While AI is being used to make self-tests, study aids, and a wide range of other learning materials, tutoring systems have arguably the most potential to improve student understanding and performance. Programmed to mimic human tutors, these systems engage in a Socratic dialogue with the student by asking questions and providing structure to guide them through the learning. Students can also ask the tutor to focus on particular areas where they struggle. In this way, AI personalizes learning by giving students the specific help they need.