Dr. Keith H. Dunlevy, 56, a retired principal with the Montgomery County schools, where he helped develop individualized learning and team teaching programs, died of cancer Oct. 14 at his home in Rockville.

Dr. Dunlevy was born in East Liverpool, Ohio. He served with the Army Corps of Engineers during the Korean War. He graduated from Geneva College in Pennsylvania and earned a master's degree in education administration from Westminster College in Pennsylvania. He received his doctorate in education administration from Memphis State University.

He taught in the public schools of Ohio before moving to Montgomery County in 1965 and joining the public schools. He had been a principal at Bushy Drive and Highland elementary schools in Wheaton.

In addition to his other contributions to the school system, he helped develop the "Birthday School" concept in which children were permitted to begin school on their fifth birthday. He retired in July from Meadow Hall Elementary School in Rockville.

Dr. Dunlevy had served on the board of the Gaithersburg Church of the Nazarene.

Survivors include his wife, Elva Jean Dunlevy of Rockville; two daughters, Jeanine Dunlevy of Rockville and Kathryn Dunlevy-Wilson of Sacramento, Calif.; two sons, David K. and Rick H., both of Gaithersburg; two sisters, Erma Rambo and Eunice White, both of East Liverpool; a brother, Charles E., of Ingleside, Tex., and four grandchildren.