Mary L. Haff has filed to run for a fourth term on the Charles County Board of Education.

First elected in 1990 when school board terms were two years, Haff, 58, is in the middle of her third term on the board and twice served as vice chair. She was twice elected to four-year terms, in 1992 and 1996. The St. Louis native has been a resident of Charles County since 1981.

"I think there is a tremendous amount of good happening right now and I don't want to stop in the middle of it," Haff said yesterday.

Haff said some of the issues she is most interested in are minority achievement and improving the system's career center.

She has been active in special education and has served on the advisory board for the Southern Maryland branch of the Multiple Sclerosis Society. Her daughter, now 32 and a former Charles County public school student, has been battling the disease for nearly 10 years.

A former elementary and middle school teacher, Haff said running for the school board seemed a natural step for her. "I felt as a school board member I could make a difference," she said. "I try to be available to parents and students and be ready to walk them through the process."

CAPTION: MARY L. HAFF. . . first elected in 1990