In the form of a discussion between faceless people, this booklet concerns discovery learning and its advantages. Subjects covered in the discussions are: Introducing the Discovery Method; An Experiment with British Railways; The OECD Research Projects in U.S.A., Austria, and Sweden; How the Discovery Method Differs from Other Methods; Discovery Parallels in Education; Applying the Discovery Method; How the Type of Training Affects What We Learn; and The Pros and Cons of Discovery. Four Appendixes present Comparisons between the Two Groups of Trainees in the British Railways' Experiments with the Discovery Method; The Start of Three Micrometer Programmes; The Discovery Programme for Reading a Micrometer; Specimen Frames in the Heinemann Programmed Text "The Micrometer." (DB)