The Chattooga County Agricultural Fair opens tomorrow at 5 PM.  Students in the Chattooga County School system will have a half-day of school on Thursday and Friday during the fair.  Thursday night is Free Student Night at the fair.  All students will not have to pay the $5 gate admission on Thursday.  The free gate admission is sponsored by the City of Summerville.  All entertainment and events are covered by the $5 gate admission, but rides are extra.   Ride armbands are $25 this year.  The fair hours on Thursday are from 5 PM until 10 PM.