The Florida Times-Union reports that the images were posted on social media pages Thursday. District officials say school staff took the signs down as soon as they were reported.
Schools are closed Friday in honor of Veterans Day.
First Coast High has had struggles in recent years with parents and students unhappy with some events at the school, including social media postings showing students fighting, shouting and walking in and out of classrooms.
Mike Kennedy has been writing about education for American School & University since 1999. He also has reported on schools and other topics for The Chicago Tribune, The Kansas City Star, The Kansas City Times and City News Bureau of Chicago. He is a graduate of Michigan State University.
