(Video above were the Greenville County Schools precautions announced Thursday.)Greenville County Schools announced Friday that it is eliminating all nonessential visitors during the school day and limiting after-school activities and events.District Director of Media Relations Tim Waller said the move applies to parents, volunteers, mentors, lunch visitors and outside speakers. >>>Compete coverage and latest on COVID-19 national emergencyOutdoor activities that happen when the school day has ended will be permitted, for now, as long as there is ample space to maintain social distancing, Waller said. These new restrictions do not include essential business, such as meetings related to Individualized Education Plans, Individualized Graduation Plans or individual parent conferences called by teachers or administrators, Waller said.The district has also decided that until further notice, Roper Mountain Science Center is suspending visits by out-of-district school groups. Some student groups from outside Greenville County Schools have already canceled reservations due to restrictions put