Mark Sheldon and Didi von Deck have danced together for over 25 years and were successful competitors in the open amateur, over 35, and professional divisions.  Together they represented the United States at 7 World Championships and were the first US representatives to the World Games in 2001. They were 5 times undefeated US standard champions in the over 35 division and were 3 time Blackpool finalists.  They won many US and international competitions during their years of active competition.  

Mark and Didi have been longtime coaches of the MIT ballroom dance team and have taught the BU, Harvard, and UConn teams as well. They have taught at MassABDA's winter dance camp and the Diamond Dance Camp and given lectures at the US National Championships and routinely conduct workshops in the area.  They are adjudicators for many of the area collegiate ballroom dance competitions. They are available for private lessons.