Emory Turner and the rest of the track team at E.E. Butler High School never had a hurdle to practice leaping over, but they properly learned how to clear one by using a chair in its place. Apart from those chairs, the school, which served Gainesville’s black students before desegregation, cleared many hurdles during the era of Jim Crow laws. Its short history was celebrated Saturday, Aug. 24, on the 50th anniversary of the school’s closing.