Bessie Wood Cramer, 77, a retired D.C. public school supervisor, died Tuesday at Carriage Hill Nursing Home in Silver Spring, where she had lived for two years.

Mrs. Cramer retired in 1960 as director of supervision and instruction for elementary schools. Before that, she had been a director of special services in the elementary schools of Division I, when the school system was still segregated.

She had played a key role in planning for integration of the schools after the 1954 Supreme Court ruling.

Born in Maryland, Mrs. Cramer had moved to Washington with her family as a child. She graduated from the former Wilson Teachers College. She later received a bachelor's degree from George Washington University, took further studies at Columbia and Catholic universities and earned a master's degree at the University of Maryland.

After serving as an elementary school teacher for 10 years, Mrs. Cramer was promoted to a supervisory position in the D.C. elementary schools and then was administrative principal at Peabody-Hilton and Wheatley elementary schools.

Mrs. Cramer was a member of the National Education Association, the American Association of School Administrators and the National Association of Elementary School Principals.

She was founder and past president of the local chapter of Delta Kappa Gamma Society, an international honor society for women in education. She was an active member of Christ Episcopal Church, Capitol Hill.

It is suggested that expression of sympathy be in the form of contributions of the American Heart Association, the American Cancer Society or to Christ Church.