Dale Irby in 1973 (left) when his streak began, and in 2012, when the last of his 40 wonderful school photos was taken. Courtesy of Dale Irby and The Dallas Morning News hide caption itoggle caption Courtesy of Dale Irby and The Dallas Morning News The Two-Way 40 Years Of Disco Duds Prove A Teacher Can Be Awesome, Too July 5, 2013 In every school photo for the past 40 years, Texas gym teacher Dale Irby wore the same '70s-era sweater vest and wide-collared shirt. It began as a dare and become something much better. We knew our parents were awesome. He proves our teachers were too.