Evalyn D. Cheesman, 87, who taught English in Montgomery County Public Schools for two decades, died April 8 at an assisted-living facility in Sykesville, Md.

She had complications from dementia, said her daughter Cynthia L. Kehr.

Mrs. Cheesman taught from 1966 to 1986 at schools including Gaithersburg Middle School and, in Rockville, Robert E. Peary High School and Earle B. Wood Middle School. She lived in Montgomery for about six decades before moving to assisted-living care several years ago.

Evalyn Jane DeFord was born in Bedford, Ind., and settled in the Washington area in 1946 after volunteering with the USO during World War II.

She received a bachelor’s degree in the 1960s and a master’s degree in 1972, both from the University of Maryland and both in education.

After her retirement, Mrs. Cheesman tutored children in reading and writing and volunteered for political campaigns and voter registration drives. At Asbury Methodist Village in Gaithersburg, where she lived for a time, she volunteered at the thrift shop.

Her marriage to Edward L. Longley ended in divorce. Her husband of 25 years, Thomas P. Cheesman, died in 2008.

Survivors include three daughters from her first marriage, Nancy L. Weichbrod of Santa Barbara, Calif., Suzanne Longley Morton of Bellaire, Tex., and Cynthia L. Kehr of Monrovia; two sisters; a brother; six grandchildren; and a great-granddaughter.

— Emily Langer