This booklet is designed to provide information on the Comprehensive School Mathematics Program (CSMP) elementary school mathematics curriculum. It attempts to capture the excitement of a workshop experience as well as convey a wealth of substantive information. Paralleling the format of a typical workshop, it presents in a descriptive format a demonstration and a group lesson and discussion for each topic, with a set of questions and answers included for the first topic. The five topics are: the language of the Papy minicomputer, the language of arrows, the language of strings, detective stories, and the hand calculator. The booklet concludes with a section on implementation issues, concerned with questions often asked by schools concerning the adoption of the CSMP program. (MNS)