Grace Birgfeld Murphy, 90, an early teacher in Montgomery County schools, died Thursday at Holy Cross Hospital after a heart attack.

In 1906, she became the first teacher at the old Bethesda-Chevy Chase School, then a one-room school-house that later evolved into Bethesda-Chevy Chase High School.

Until her retirement in 1966 as a teacher at East Silver Spring Elementary School, Mrs. Murphy had taught at many county elementary schools.

She then taught for an additional 10 years in private elementary schools, the last of which was the Cynthia Warner School in Takoma Park.

Mrs. Murphy, who lived in Silver Spring, continued to tutor pupils in reading and mathematics until her death.

Born in Chevy Chase, Md., she was a graduate of Central High School in Washington and of the old National Park College here. She took teacher's training at Johns Hopkins University in Baltimore.

She was a past regent of the American Eagle Chapter. Daughters of the American Revolution, and a member of the Current Comment Club, the National Retired Teachers Association and Grace Episcopal Church in Silver Spring.

She is survived by five children. Robert F. and Margaret M. Shook, both of Silver Spring, Julian G. of Washington J. Donald, of McLean, and Elizabeth Shaefer, of Riverton, Wyo: two brothers, William E. Birgfeld, of Alexandria, and Bertman A. Birgfeld, of Sarasota, Fla., 19 grandchildren, 20 great-grandchildren and three great-great-grandchildren.