sentences:  Other long-serving principals include John E. Reed who was principal from 1939 to 1960, J. Preston Barry from 1961 to 1972, Charlie Foley who was principal from 1973 to 1990, Gene Connolly who was principal from 2001 to 2016.In the recent history of Concord High School, Dr. Christine Rath (principal from 1991 to 1997) oversaw the transformation of the school from a three-year to a four-year school which included ninth-grade students.At the same time Rath assisted in the design of the current high school building which was able to accommodate every high school student in Concord.