Understudy: An understudy is a dancer who will learn the choreography and be part of the team for learning purposes. This is an individual who has either asked the instructor to understudy in order to improve his/her skills in this style of dance and/or the instructor has asked him/her to understudy for similar reasons. Understudies will not necessarily be given an opportunity to perform the dance on stage.
Alternate: An alternate is a dancer chosen by the instructor/choreographer who will be the first person to fill into the dance should the need arise. The alternate may have similar skills, or higher-level skills than the other dancers on the team. An alternate may or may not be required to attend all rehearsals.