From ancient times to the present, dancers have expressed ideas, stories, and rhythm with their bodies. They use a variety of dance forms that allow free movement and self-expression, including classical ballet, modern dance, and culturally specific dance styles. Many dancers combine performance work with teaching or choreography. Dancers perform in a variety of settings, including opera, musical theater, and other musical productions, and may present folk, ethnic, tap, jazz, and other popular kinds of dance.