Throughout the world, increased attention is being paid to the promotion of out-of-school activities in the fields of science and technology. The United Nations Educational, Scientific and Cultural Organization supports a wide range of activities such as science clubs, fairs, Olympiads, museums and centers. This publication presents a broad picture of these various activities. Sections are included on: (1) "Clubs, societies and congresses"; (2) "Science fairs, research and project work"; (3) "Olympiads, contests and talent searches"; (4) "Visits, excursions and camps"; (5) "Mass media, museums and science centres"; (6) "Training, evaluation and general issues"; and (7) "JETS of Zambia--a case study". Appendices include: "Specimen constitution of a science club"; "Junior science academies--examples from the USSR"; "Organization of a science and technology fair"; "Research and project work"; "Olympiads--examples of questions from recent international chemistry and physics Olympiads"; and "Science field trips and science camps in British Columbia (Canada)." (CW)