The O'Sullivan School of Irish Dancing, LLC was re-opened in February 1996 by Deirdre O'Sullivan-Toolan, TCRG and Anna O'Sullivan, ADCRG. The school originally began in 1963 when Anna emigrated from Scotland. The school has a worldwide reputation for producing top level solo and team dancers.

Classes are offered in tradional Irish dancing for ages 4 and up.

Class locations include Croton Falls, Dobbs Ferry and Chappaqua, New York.

Recently, a West Coast branch was opened in Southern California by Theresa O'Sullivan, TCRG. Class information can be obtained upon request.

All students are offered an opportunity to compete in Feisanna (competitions), beginner through open champion level.

Anna O'Sullivan is a founding member of the IDTANA and 2004 marked her 43rd year of teaching Irish Dancing. She is known world-wide in Irish Dancing and is considered one of the top authorities on all aspects of Irish Dancing.