Checklists reduce errors in operating rooms. A time-out must be facilitated by a checklist and occur immediately prior to the start of each procedure. These Checklist Boards are customized to address site specific needs, from pre-op into surgery through recovery. Upon completion of each task, a slider is moved from red to green creating an audible click. Checklist Boards provide a backup to human memory during routine and high-stress situations reducing costs by error prevention.