Castle Worldwide develops high-stakes certification and licensure examinations and practice tests and administers paper-and-pencil and Internet-based examinations at more than 750 established test sites in more than 40 countries.

Sioux Falls, South Dakota’s largest city: #1 Host City in the Heart of America, 1st class facilities, 4200 hotel rooms, abundant shopping, 850 restaurants, big city entertainment, symphony, arts, culture, history, plush golf courses, & vibrant downto