Dave retired as an educator in 2022 from William J. Palmer “Palmer” High School after a 35-year teaching career. He then retired as the school’s Head Girls’ Basketball Coach in 2023 after a 27-year career. Coach Shackelford achieved 372 victories at Palmer, earning a 350-win ring from the Colorado High School Activities Association. He received numerous awards and accolades while serving as Palmer’s Head Coach. Additionally, Dave coached girls’ basketball, softball, baseball, and soccer at Harrison High School prior to joining Palmer High School. His coaching career spanned an impressive forty years, and countless athletes benefited greatly from the skills he taught on and off the court.