Sister Margaret McDonald, 93, an educator and public relations coordinator, died of heart failure Sunday at Assisi House, the retirement residence for the Sisters of St. Francis in Aston.

Sister Margaret graduated from St. Elizabeth's Commercial School in Philadelphia and worked as a clerk-typist before entering the Sisters of St. Francis convent in 1933. She earned a bachelor's degree from Marywood College in Scranton and a master's degree in business education from Catholic University of America.

She taught business courses at John W. Hallahan Catholic Girls' High School in Philadelphia and in schools in Baltimore and Wilmington. She also assisted with school newspapers and was cofounder of the Delaware Scholastic Press Association.

From 1970 to 1982, Sister Margaret was public relations coordinator for her religious order and edited its newsletter. She was press room resource person for the International Eucharistic Congress in Philadelphia in 1976 and in 1977 served on the Philadelphia Archdiocesan Communications Committee for the canonization of St. John Neumann in Rome. She had press credentials for the Philadelphia and Washington visits of Pope John Paul II in 1979.

For five years she was on the staff of the San Damiano Retreat Center in Aston. She retired in 1995.

Sister Margaret is survived by nieces and nephews.

A Funeral Mass will be at 11 a.m. today at Assisi House, 600 Red Hill Rd., Aston. A wake service followed by a viewing will be at 9:30 a.m. Burial will be in Our Lady of Angels Cemetery, Aston.