- Any student in 6th-12th grade with an interest in science and enrolled in a public, private, parochial, or home school in the state of Iowa or an ISEF designated area is eligible to enter the SSTFI. Students may enter as an individual or a team (2 or 3 students). NOTE: Iowa FFA Agriscience Fair exhibitors are only allowed two (2) person teams.
- All 6th-12th grade students in Iowa or ISEF designated areas are eligible to participate. A student does not have to win at a local, conference or regional science fair to be eligible to exhibit at SSTFI.
- Students may compete in only ONE ISEF affiliated fair, except when proceeding to a state/national fair affiliated with the ISEF from an affiliated regional fair.
- Each student may enter only one project which covers research done over a maximum of 12 continuous months between January 20__ and March 20__ (March of the year in which the fair is held -- example 2010 Fair; research completed between January 2009 and March 2010).