The document discusses the history and types of dance from the 20th to 21st centuries. It defines dance as physical movement with expressive intent and lists the elements of dance as shape, space, technique, time/rhythm, and force/energy. The types of modern dances discussed include creative dance, solo dance, group dance, ethnic dance, ballroom dance, and theatrical dance. It then outlines the major dance styles that emerged and gained popularity each decade from the 1920s to the present.