Science and technology fairs are designed to display project work completed by students from a wide range of ages and abilities. The key to organizing a successful fair is advanced planning. This guide which has been compiled with the help and advice of many fair organizers, is intended to provide a checklist of items for organizers of future events. These items are arranged in eight stages: I (15-12 months before the fair); II (12-9 months before the fair); III (9-6 months before the fair); IV (6-3 months before the fair); V (checklist and run-up to the fair); VI-VII (during the fair); and VIII (after the fair). A list of possible items of expenditure, information on funding (with sample application forms and guidelines), and sample exhibitor's entry and requirements form are included in appendices. (JN)