Janice C. Zimmerman, 88, who was a science teacher in Montgomery County Catholic schools for many years, died May 8 at her home in Gaithersburg. She had cancer, her daughter Carol Zimmerman Ossi said.

Mrs. Zimmerman began her teaching career in 1964 at St. Jane de Chantal Catholic School in Bethesda. She taught junior high science classes and later became head of the science department.

From 1988 until her retirement in 1997, she taught science at Mother of God Catholic School in Gaithersburg.

Janice Cecilia Cahill was born in Washington, and she was a 1941 graduate of the old Notre Dame Academy in the District. After receiving a bachelor’s degree in chemistry in 1945 from what is now Trinity University in Washington, she worked as a chemist for two years at the old National Bureau of Standards.

Mrs. Zimmerman received a bachelor’s degree in English from University of Maryland University College in 2002.

She lived in Bethesda for many years before moving to Gaithersburg in the early 1980s. She was a member of St. Jane Frances de Chantal Catholic Church in Bethesda and a former member of its sodality guild. She was active in the Mother of God community, a charismatic Catholic organization, and she was a Girl Scout leader.

During a three-year period, Mrs. Zimmerman walked the entire 184-mile length of the C&O Canal. She was also a volunteer at Shady Grove Adventist Hospital in Rockville.

Her husband of 29 years, John W. Zimmerman Sr., died in 1976.

Survivors include six children, John W. Zimmerman of Chagrin Falls, Ohio, Paul F. Zimmerman of Gaithersburg, Carol Zimmerman Ossi of Takoma Park, Ann C. Zimmerman of Conshohocken, Pa., Mark R. Zimmerman of Bethesda and Mary N. Roche of Ijamsville; 13 grandchildren; and eight great-grandchildren.

— Matt Schudel