He was the head coach of the Shelbyville Central High School girls' basketball team for 28 seasons. Coach Insell compiled a record of 775–148 (.840) and won 10 state championships and won, a Tennessee record, 110 straight games.[2] Insell was inducted into the Women's Basketball Hall of Fame in 2017.
National champion
Postseason invitational champion
Conference regular season champion
Conference regular season and conference tournament champion
Division regular season champion
Division regular season and conference tournament champion
Conference tournament champion