One of our local schools has Knights as their mascot.
reading-Design a castle that the kids could read in
character-earn badges of honor for each pillar of character
shields-make and design a shield for each person or table or reading group
Math- Market Days theme, put your centers in wicker baskets
Use large scrolls to post your rules and to label various areas in your room
royal court for jobs: messenger-delivers library books, takes lunch count... Knights of Organization (stack chairs, clean board)...Head Scout-line leader