The Imperial Society of Teachers of Dancing (ISTD) is an international dance teaching and examination board based in London, England. The registered educational charity, which was established on 25 July 1904 as the Imperial Society of Dance Teachers, provides training and examinations in a range of dance styles and certified dance teacher courses. The ISTD is recognised by the Qualifications and Curriculum Authority and the Council for Dance Education and Training and is also a member of the British Dance Council. It hosts various competitions in many different formats including Modern Ballroom, Latin American, Classical Ballet and Tap Dance as well as contemporary styles like Disco Freestyle.