Simplify the following text for a Grade 8 native English-speaking person.
Original: An athletic director ( commonly `` athletics director '' or `` AD '' ) is an administrator at many American colleges and universities , as well as in larger high schools and middle schools , who oversees the work of coaches and related staff involved in intercollegiate or interscholastic athletic programs . At some colleges , the athletic director may hold academic rank but this practice is on the wane .
Simplified: Most colleges and high schools have an athletic director .