Rebecca E. Andrews, 73, a physics teacher in D.C. public school system for nearly 30 years before retiring in 1960, died Monday at Georgetown University Hospital after a heart attack.

Miss Andrews taught physics at Eastern High School from 1931 to 1953, then joined the faculty at Woodrow Wilson High School, teaching there until her retirement. From 1967 to 1976, she taught mathematics at St. Cecilia's Academy in Washington.

In 1958, she was granted a science teacher citation by the Joint Board of Science Education and an award from the National Science Teacher Association. She was a 1970 recipient of a National Association of Secondary School Principals Award.

Her professional memberships included the National Science Teachers Association, The National Council of Teachers of Mathematics and the National Education Association. Miss Andrews was a member of the Philosophis Society of Washington and Phi Beta Kappa.

She attended St. Matthew's Cathedral in Washington.

Miss Andrews was a native of Augusta, Ga., and graduated summa cum laude from the University of Georgia with a bachelor's degree in Latin in 1929 In 1930, she earned a master's degree in physics and mathematics at the university. Miss Andrews taught physics at Georgia for a year before moving to Washington in 1931.

Survivors include a sister, Marion McInerny of Bethesda.