The Christian County Board of Education said goodbye to board members Linda Keller and Sue Hayes on Thursday at its regular meeting. Both members decided to step down from their seats after many years serving Christian County Public Schools. âIâve known Mrs. Keller for a long time,â Christian County Public Schools Superintendent Chris Bentzel said. âI want to say âthank youâ for 12 years of service â¦â Keller has served on the school board for 12 years. She spent the last six years as the board chair. âHer leadership, her mentoring of me as a new superintendent, her guidance ... has been just phenomenal,â Bentzel said.