Marjorie Davies "Midge" Smith, 72, who taught kindergarten and first grade at Georgetown Day School in Washington for 12 years, died Aug. 23 at her home in Kensington of amyotrophic lateral sclerosis, which also is known as Lou Gehrig's disease.

Mrs. Smith was born in Springfield, Ohio, and graduated from Smith College. She received a master's degree in early childhood education at the University of Maryland.

In 1952, she began working in day care and kindergarten in Arlington. Later she accompanied her husband on Foreign Service assignments to India, Somalia, Libya and Liberia. In these postings, she served as assistant director of a well-baby clinic, as a member of the teacher selection committee at the International School in Bombay and as a first-grade teacher at the International School in Mogadishu. She also sang in international choruses in Tripoli and Liberia.

During home assignments, she did kindergarten and day-care work in Montgomery County.

She retired from Georgetown Day School in 1993.

Mrs. Smith sang in the choir at Cedar Lane Unitarian Universalist Church in Bethesda.

Survivors include her husband, Harden Smith of Kensington; three sons, Christopher Smith of McLean, Peter Smith of Woodsboro, Md., and Matthew Smith of Addis Ababa, Ethiopia; and four grandchildren.