Parents who have been puzzled over the past five or six years about the ""New Math"" can take considerable delight in this presentation. It is not another of the books which in presenting even simple exercises in set-theory Or probability become frustrating to the undisciplined adult reader. These--and there have been many--were based on the assumption that by learning how to participate in the new exercises, parents would be more comfortable with their children's school studies. Adler does not fall into this trap. Here is an adult, accurate rationale for teaching mathematics through the mode of discovery. The parent will discover the currently vogue theories of learning psychology which are at the base of ubiquitous changes in school curricula. The book goes on to explore the major math revisions based on the new approaches to learning and concludes by examining the role of mathematics learning in the developmental cognitive processes. Sound, accessible orientation for adults concerned about the new curriculum movement.