Abstract: In a teaching machine which permits a student to skip or request a hint related to a question being asked of him regarding subject matter he is being taught, the student is presented with a set of predetermined questions relating to the subject matter. A record is kept of questions he answered incorrectly, which were skipped, or for which a hint was requested; and a set of questions is prepared on the subject matter specific to the student, based on incorrect answers to the questions previously asked of him, questions skipped and questions for which he requested a hint.