This introductory book of a two-part publication, designed as an in-service tool for teachers of grades K-9, is based on the postulate that a teacher should become a better problem solver in order to teach problem solving more effectively to students. This booklet provides an overview of problem solving as a process used daily by all individuals and as a curriculum goal important to all disciplines. A substantial portion of the booklet is devoted to introducing strategies, methods useful in getting started on problems, and successfully solving them. Though the booklet uses mathematical problems as the medium for problem solving discussions and activities, the techniques have application to virtually any problem area. The booklet is intended for interactive use, it may be studied individually or be used by groups of teachers. It is planned in sections which are preceded by objectives in that section. The major portion uses a strategies approach to problem solving. Sections are organized by clusters of related problem solving strategies. Each strategy of a cluster is discussed and illustrated in the solution of a problem. (Author/MK)