A Non-Traditional High School Program In Kingsport Is Receiving Recognition. D-B Excell Has Been Named A Blended Learning Universe School By The Clayton Christensen Institute. Excel Is One Of Four Universe Schools In Tennessee And Is The Only High School Level Program In The State To Receive The High Honor. Virtual Students Complete Course Work At Home And Attend The Excel Campus Only When They Are In Need Of Additional Support. Clayton Christensen Institute Is Based In The San Francisco Bay Area.