All exhibitors must be interviewed at their projects by at least one judge. The purpose of all interviews is to determine the exhibitors’ familiarity with the project, the science involved, and to give the student an opportunity to meet the judges, react to questions and to discuss their work with a recognized leader. Care must be taken to allow a reasonable interview time within the time limits allotted for judging.
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Not more than two students, male or female, may be certified as finalists to the ISF from an affiliated science fair. They must be students in 10th, 11th or 12th year classes in a public, private or parochial school.
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A student who will have reached age 21 on or before May 1, preceding the ISF is not eligible to participate as a finalist in the ISF.
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A student may enter only one project and it must be his own work. Group projects involving two or more students give experience to beginners and are acceptable in S or R fairs but may not be entered in the ISF.
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The identical repetition of previous year’s project is not permitted. However, a student may again exhibit work on a continuing problem provided the work demonstrates considerable progress when compared with the previous year.